
Constellation Reviews
formerly MXEnergy
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About Constellation
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Constellation provides energy solutions, specializing in electricity and natural gas. The company offers supply and management services for residential, commercial and industrial clients. Constellation also incorporates renewable energy sources and innovative energy efficiency programs.
- Significant cost savings reported
- Reliable service during outages
- Frequent billing discrepancies
- Poor customer service in some cases
Constellation Reviews
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Reviewed April 8, 2024
Company will STEAL from you. Without my permission they changed my power bill to them and charged me for a year's worth of power. Their rates are 50% more than Ameren's. I called them to cancel the service they scammed me out of and they didn’t cancel and continued to charge me. Someone needs to sue this crooked company and shut them down.

Reviewed Jan. 4, 2024
I received an email stating that I signed up for a three year deal and my cancellation fee was 150.00. Problem is, I didn’t sign up and they refused to remove the fee. I would never use this company based on the horrible reviews anyway.
Reviewed Nov. 27, 2023
Let me start off by informing you how manipulative this company is. They made promises regarding pricing, encouraging me to switch over. However, they’re overcharging each and every month. I even tested it out when I didn’t stay at my home for a month on vacation, and the pricing was still the same and sky rocket on certain days. They literally make their own pricing and just charge you. This is the absolute most expensive, worst customer service, and horrible all around light company I’ve ever experienced. I cannot wait until my lease is up to cancel this ridiculous company. My lease is almost up and I’ll never use them ever again and encourage others to follow suit as well. There’s not one positive thing I can say about this company.
Reviewed Oct. 17, 2023
After discovering that the city I live in opted me (without my knowledge) into a contract with this entity I contacted Ameren to inquire about my options. Soon I discovered that the rates I was paying were twice Ameren's rates and so immediately terminated my relationship with Constellation and purchased service directly through Ameren. The following month after ending my service with Constellation (which I didn't even know existed until this moment) they sent me a bill in excess of $700 which I had no choice but to defer to payments. Unbeknownst to me I purchased power at double the rates for at least a year and I struggled to pay these. Once I discovered why and opted out they hit me with the largest power bill I've ever seen. I live in an 800 sq ft home with 1 bedroom, no washer or dryer, and no dishwasher, with my partner and our 3 year old permantly disabled daughter.
We are preparing to face disconnection and homelessness because an entity like this exists. I don't need a utility middleman charging my family double rates without our knowledge and then penalizing us when we discover their and the city's schemes. I need a safe home with affordable water and power to raise my disabled daughter who requires these services just to survive literally. They destroyed me and my family for what?

Reviewed Aug. 21, 2023
About 10 years ago we had 2 heat pump systems replaced by then BGE. They did a great job. We took out a service contract that we cancelled in 2019 that we cancelled in 2020. We recently scheduled a service appointment with now Constellation Homes. I took off work on this day but they never showed. I called to inquire. I was told that they will NOT be coming out as I was in 'collections'. Every time I tried to contact their billing department, I was "disconnected" or could not get anyone to respond. It took a complaint to the BBB to get them to contact us. Turns out that there were NO collections and they were trying to recoup money from my cancelled contract. They now offered to come out but I declined. They are dishonest in their billing, lack any customer service and they cost me an entire day of lost wages. And my heat pumps still have not been serviced.
Reviewed July 14, 2023
Upon researching costs of a home warranty, my estimate turned into a whole house warranty contract. I received a notice that they do not service my zip. I was getting statements that I thought was junk mail. To my surprise I’ve been billed. When I got to speak to a human in charge I was told I could not cancel and that I approved a contract. Trying to figure out my options. I guess next step is attorney general.
Reviewed June 29, 2023
This company is poor with their communication as well as their products and services. They showed up at my house and turned my gas off with no warning, for whatever reason when I called to have them turn it back on I was giving a lot of run around. I simply explained to them that I have a young child at home and if someone can come out sooner that would be greatly appreciated. The representative told me that I would have to get a letter stating my child’s medical condition and then they would have to reach out to the gas company to see if they can send someone out sooner that July 3rd. I then asked for the number for the gas company which she basically said there’s no point of calling them because they would direct me back to my provider. I am so frustrated because no hot water is a huge concern/inconvenience, especially with a young child. I will definitely not keep their services after this.
Reviewed March 24, 2023
I recently spent an hour changing to their 3 year electric rate of 17.49 cents, and everything was completed, including 3rd party phone call confirmation. Next month I found they were still charging me 38 cents instead of 17.49, I called them and was told the process was not completed. I was paying higher rate for 2 years, because they failed to do the change 2 years ago, and then I never checked my bills. This company without doubt is very dishonest and robbing customers. Please beware. I will talk to Attorney General's office if they can take class action lawsuit against this company.
Reviewed March 14, 2023
My heat was turned off with a $0 balance and then to make matters worse, I had to wait 5 days for a technician to come and turn it back on. Customer service told me that it was not an EMERGENCY unless I have a gas leak. Are you kidding me, this was your fault!!!! I would not recommend this barbaric company to my worst enemy. DO NOT LET this company service your heat.
Reviewed Feb. 27, 2023
I received a promo rate years ago for my electric that was better than Potomac Edison. My bill was never higher than $350 in winter. When I started getting bills over $400 and then $500, I contacted them. They jacked my rate up to 14kWh- far more than Potomac Edison's variable 6-9 kWh. I have been overpaying for months because they don’t put their rate in the bill and calling takes up to 5 days for a response. I feel extremely cheated by this company and want everyone to beware of them.
Reviewed Jan. 3, 2023
Subscribed to their service in 2013. Must have been a good deal at the time. Checked my price recently and they were $500.00 higher monthly than the local company. I do not know how long this was going on, they never made contact with me once my initial contract us up. I was then billed a "variable" rate. This most likely has cost me thousands over the years. It has taken me 4 days just to reach the company to get information. Hold times were anywhere from 2 to 4 hours for commercial customers. I was able to call and reach Customer Service for residential customers with limited hold times (6 or so minutes). I was always transferred, ending in several hours of wait time.
In order to go with our local gas company, I had to get a disconnect from this company before my local gas company could switch my services over. I had no choice to to endure the wait times and it took close to 5 hours on hold before finally getting to the correct Customer Service Representative to complete the transfer of gas services. Horrible customer service I would never recommend to use this company. Don't make the mistake I did. If you don't hear from them, get in touch as soon as possible. Good luck. I'm happy to finally be done with it all.
Reviewed Oct. 14, 2022
Due to an automatic payment glitch, my gas was turned off for 5 days. We have kids and the weather will be in the 30’s before we can get it turned on. The customer service was terrible trying to work out this issue. We will definitely not be using this terrible company again. We would have appreciated a phone call or text before turning off such an important utility. We were told that kind of service was way above and beyond what the company was comfortable paying for. Constellation, after 12 years as a perfect paying customer, I will definitely change to a company that values its customer’s needs and safety.
Reviewed June 2, 2022
We recently purchased a new home and tried to switch Constellation over. When we renewed our 3 year contract, the sales guy told us that service is transferable if we move and we are guaranteed at the locked in price. After being on the phone for countless hrs, they insist on transferring service to the new home at a higher price than what we are in a contract for. So what is the point of a contract??? After being transferred to many reps, our call was finally escalated to the mgr. We received a call back from the mgr himself and he said we can transfer the service but at a higher rate. We told him that this was not what we were told and was very dissatisfied with this service and will be writing a review. He hung up on us! TRUE SCAMMER action! Please do yourself a service and use some other company and not Constellation. It was a horrible experience from the get go, from setting up the account for auto pay to billing.
Reviewed Jan. 24, 2022
I received a PowerPlug from Constellation for being a customer. It works with an app that allows you to remotely control whatever devices (appliances, lights etc…) that you have connected to the PowerPlug. It was a neat little gift until it wasn’t. I’ve been unable to get on their app because it won’t recognize my name. After countless phones over several months they still can’t get it figured out! When I call now it’s the same old, "We’re working on it, will call you back" etc… A large amount of wasted time with no results. Now they don’t return calls or offer any assistance except to apologize profusely when I inquire to what the status of my work order is. So I have a plug that is essentially just that a plug. I’m so frustrated with their incompetence and indifference I don’t see keeping Constellation Energy when it comes time to renew.
Reviewed Nov. 19, 2021
We have used this company for several years and have been pleased with their service. Plus their rates have been fair. During peak times, adjustments in relation to usage have been appropriate. They have been very responsive during any power outage or other issues that have arise.
Reviewed Feb. 3, 2021
I finished a three-year contract with Constellation energy. And switch to another energy provider. Unbeknownst to me constellation seemingly sent me a renewal notice that I did not get. As a result of my switching to another company they hit me with $150 cancellation fee for the contract that renewed itself without my review. Calling constellation resulted in a unsatisfying call that indicated The only way to get rid of the $150 charge was to renew my contract with constellation. This should not be permitted. Contracts should be required to be reviewed by the buyer at renewal and I believe that constellation energy is violating some sort of consumer protection for the state of Maryland.
Reviewed Dec. 15, 2020
If you use this company and want to pay automatically by credit card, be prepared for a disaster. The web interface is horrible and the customer service function is partly outsourced, and doesn't work well at all. Use Constellation only if you want to waste time on hold and deal with constant billing problems. This is easy with all of my other utilities and they have made an absolute mess of it.
Reviewed Nov. 24, 2020
I enrolled to Constellation on a Friday and got an email from them that they have cancelled my enrollment and should I have questions contact them. I wanted to understand the rationale behind the cancellation and a Parrot (Becky was the name I suppose) they call as their Customer Agent, parroted 4 times "A Constellation Energy Customer Representative will call to provide you with the details" and that there is nothing she can do.
Fearing the worst, I enrolled into another REP. Then I get a call on Monday that I am successfully enrolled to Constellation!!! I had then call their wretched Customer Support again!!! The line was extremely bad. I pity Marla, the agent who tried to help me. I could not hear a word she was saying. Poor thing did try to help. However, apparently, post my call to them Constellation went ahead, reviewed my case and approved; AFTER CANCELLING my enrollment. Now I cannot go back to my previous provider and the have to wait for the new provider to enroll me... All in all an extremely bad experience. STAY AWAY FROM THIS ONE....
Reviewed Nov. 18, 2020
In MD there are far better choices on the PSC website. And, Constellation has many Complaints filed at the MD PSC. Just avoid. When you call to cancel the account you are put ON HOLD FOREVER, so you can listen to all their commercials. Bad and sad.
Reviewed June 22, 2020
Constellation is a dishonest and "scam" of a company. Representative stopped into our facility 2-3 times a month for at least 6 months, brought bagel and donuts. He seemed like a genuine good guy, so we signed up. From the beginning, the gentleman disappeared. Stopped answering his cell phone. The rates we agreed on were doubled, energy bill was doubled. We moved to a bigger location less than a year into the contract they hit us with a $550 cancellation charge and 3 month service charges. PLEASE DO NOT LET THIS COMPANY IN YOUR OFFICE!! It's a Scam!!
Reviewed June 1, 2020
Bait and Switch Operation. Quoted me a price of 8 cents a KWH, but then changed to 16 cents a KWH for anything less than 500 KWH, and a minimum of $80 a month no matter how much electricity I will use....I am in the process of canceling the request for service and I am still with the old Provider and with this experience on the phone to cancel the request for service I feel they will be a NIGHTMARE company to deal with...Customer Service Providers are sitting in India and Philippines...have no clue...They hand up on you to avoid the cancelation....Avoid this company like COVID-19...Social distance this company forever or get some therapy planned ahead of time if you want to deal with them for a year.
Reviewed April 24, 2020
Updated Review on 06/12/2020: Please do not believe anything you read about Constellation Energy at ** or **. These sites have many identical reviews despite representing customers from different states. This similarity indicates the reviews are manipulated. This particular review is an update from a previous review sent to ConsumerAffairs in April. It has not yet been posted because they are still waiting for a response from Constellation. Other review sites described in detail the predatory marketing practices of this brokerage company (they and their parent company EXELON are not really energy companies at all, much like Enron).
They convinced my wife, who has dementia, into changing gas providers. Then, when I attempted to change the account to my name (because of my wife's limited capacity to check the monthly billing emails) they asked for a ridiculous disconnect and reconnect fee. Since they are a brokerage company, and not a utility company, they have nothing to do with actually turning your gas utilities on or off. Then they split the account, but did not send me any of the bills or history from the old account. It looked as though they did not credit one of my payments, but it was actually credited to the old account for which I had NO information.
After months of complaining (both directly and through Better Business Bureau complaints) they finally explained that the payment was credited to the old account. Of course, I would not know this because I was locked out of that account in my wife’s name. Finally, I asked them to send me a zero-balance bill from the old account so I can pay the final bill on the other account and be assured they are not hiding any additional debt claims that I don’t know about. They have not responded even after I sent registered letters to their CEO and the CEO of their parent company (EXELON).
I have now spent more money trying to get a response than I owe them, so I have given up. Luckily I teach chemical engineering at a U.S. university so this experience is now an illustrative case study for both chemical engineering classes in the energy field, and in a class I teach in new technical startup. Constellation puts significant resources into its marketing, but its customer service infrastructure is dismal. You should avoid this company at all costs.
Original Review: I made previous complaints that Constellation messed my account and bill in various ways, and I terminated service with them. I am still not free of their utter incompetence as they claim I still have an unpaid balance with them. They failed to post a bank debit card payment of mine. I have the bank records and reference number for the transaction, but after several months I cannot get them to fix the error because I cannot penetrate the gauntlet of incompetence they call customer service. The people that work for customer service are quite nice, but they work for an incompetent corporation.
I have filed a BBB complaint and will sue them in small claims court should that not resolve the situation. Exelon is their parent company and it follows a revenue model of virtual energy companies like ENRON (perhaps you remember how that turned out). They are energy brokers that move energy resources around and then contract with local delivery companies that connect this resource to your home. Then they invest in the bare minimum level of customer service infrastructure to tempt with short term utility rates, but they cannot competently resolve issues when they make billing and account mistakes. I switched to Georgia Natural Gas, and I recommend you contract with a local provider even if it is a bit more expensive. Avoid Constellation and any of the subsidiary companies of EXELON which you can find at **.
Reviewed April 9, 2020
The sales make a commission and because of that the sales rep I had to work with, Angela **, was just spouting lie after lie about anything she can to get me to sign. I actually read contracts and I told her that multiple points were the opposite of what she said (basically I would get all these extra charges and fees that she said she guarantees I won't get). She stated that those points in the contract are inaccurate and what she is saying is the truth, yet she said she was not willing to email any of that because 'she's not allowed to put any of this in writing' which is very odd. I said I can ask the customer service agents in email and see if they are willing to write any of the information back.
She said "you know what, clearly you're not comfortable with this so you shouldn't send anything and you should just think about what it is you want." Pretty odd too. So I emailed them anyway and turns out everything she said was a lie. Then I looked at the reviews of this company and I'm disappointed I didn't look earlier, otherwise I could've saved my time. Apparently, they have a reputation for their bad sales reps and poor service. I should've guessed when just to start service took a 30min wait time to get to a rep. That's always a bad sign.
Reviewed April 9, 2020
Sometime around August of 2019, I used the chat function to discuss with an agent how to get my plan transferred from my parent's house to my new house. Never having done this before, I trusted whatever she was going to do was correct. She advised that I switch my plan over to the new house and that my parents sign up with a separate provider of their own. Sounded legit enough. Long story short, my closing date (which was also my switch date) came along and, lo and behold, power was completely cut off to my parent's house.
Naturally, we called the new provider of my parent's house (Gexa) and waited for nearly 2 hours, only to find that Constellation had sent an order to CenterPoint (main energy provider) to discontinue electricity service to my parents house, rather than simply transferring service to the new house and transitioning existing energy to my parents house over to Gexa. At the time, my mom was undergoing testing for breast cancer. She certainly didn't need this type of stress. In the middle of Houston heat, the house was burning up to nearly 80 degrees inside. With no internet, no means of cooking, no lights, and total discomfort, I decided to front a hotel, while Gexa promised to work it out with Centerpoint on how to expedite getting power restored to my parent's house the very next day.
It wasn't easy to find a place for one night and on a moment's notice, that was also pet friendly. Not to mention I was the only one with an available car since, you guessed it, my parent's car was stuck in the power operated garage. With work the very next day, I grabbed the basics and arranged to take an Uber to work so that my parents can use my car to get back (to an eventually powered up) home. I'm no expert, but there HAD to be SOME way that could have played out better.
I paint the picture with details because it doesn't end there, the WORST part was how Constellation reacted after I called to discuss and find out what had happened. I was unfortunately handed off to some guy who had zero empathy and zero respect. I'm not sure to this day that I have EVER been so disrespected. I got no answer or explanation for the mixup, except for phrases that could be summarized as "things happen when you are on chat, they don't always know what you mean" "you should be grateful, it could have been worse, everyone is OK."
If my call was truly recorded, I would love for them to pull the call up. There were also long periods of silence in between my time conversing with this idiot (no background noise), knowing I was clearly being muted, which infuriated me further. In summary, stay far, far away from this company. It doesn't take a trained monkey to do a little research and see how poor the reviews are. I'd pay a few extra cents if it meant getting better service than I got with them.
Reviewed March 23, 2020
After being lured in by the promise of lower rates, they wound up noticeably higher than my electric supplier. Not only were they higher, but, after cancellation, they continued to bill me on an outside light at 148 kwh per month for 22 months (as you've likely noticed, electric bills are insane to try to read through and decode, so, I didn't notice it until my electric company pointed it out to me). Here's the slimy kicker- the outside light that they were still charging me for, doesn't even have a meter on it! MY electric company had set it up on a flat rate when first installed. So, how on earth could they charge by kwh?? Good question. Must be nice to just make up a number and charge the customer. I will be contacting the Attorney General and doing my best to shut these scumbags down!!!
Reviewed March 6, 2020
Be mindful of nice people at the mall! When I signed up for their services, my bill was supposed to go down, but instead my bill ended up being higher than if I stayed with PECO. I'm digging in much further on this, but they are now demanding $150 to allow me to leave. I feel really bad to the seniors who are signing up to save money on their gas and electric. BAD DEAL AND STAY AWAY!
Reviewed Feb. 21, 2020
i switched to them because they offered lower rates and would guarantee them. After the first bill, there were all kinds of hidden charges and my bill was actually higher. I called them and they offered to let me out of the contract but they charged me $100 cancellation fee. Don't trust these guys. Check ratings. Theirs is among the lowest in the industry.
Reviewed Feb. 4, 2020
I chose Constellation as the cheapest bid for my new a/c purchase. They are not only horrible but dishonest. They made numerous installation errors, which they promised to fix, but no-showed every time and then quit returning my calls. They also left a huge hole where the wiring entered my house through the exterior bricks, and I've now learned that rats have been entering my attic through the hole, and it's going to cost me tons of money to address this problem. DO NOT do business with these incompetent and dishonest people!!
Reviewed Dec. 12, 2019
I signed up with Constellation in September 2019. I received a contract from them. They were supposed to switch me over to their service by 10/15 the latest. The rate was supposed to be .855 fixed for 12 months. As of 12/11 they had NOT changed me over to them costing me an extra $50 per month for two months =$100.00 in extra costs, When I called they admitted that an incompetent representative had NOT submitted the paperwork, but they had zero intention of remedying the situation. DON'T even think of using these people. Pay a bit more and sign up with reliable competent suppliers.
Reviewed Dec. 6, 2019
It is time for me to renew or change my electric supplier. I have been using Constellation for the past year or so. They sent me a notice that I compared to the Public Service Commission's official rates. Surprise! Their written quote was higher than PSC postings. I called to check and after they checked the PSC website we eventually negotiated a plan with a reasonable rate. They sent a confirmation with a link to my. Problem: The link to the supposed "documents" does not work. Called to check and someone in Central America came on line. (Note: Not good for jobs in the U.S.; and just how safe is my personal information with someone in Central America?) Waiting now to maybe receive said documents via snailmail, and how do I know these are the "Contract Documents"?
Constellation (formerly MXEnergy) Company Information
- Company Name:
- MXEnergy
- Website:
- www.constellation.com