MyPlumber Improper tankless heater installation Manassas VA

I had MyPlumber install two Noritz tankless hot water heaters. Once installed, I had hot water and didn't think much of it. A little while later, I the control panel went dead. I called the company to see about getting a replacement. When checking out the issue, I noticed the second tankless heater wasn't even plugged in. There is no outlet to plug it into. So when the company did the installation, they tried to make an extra buck by not even installing it correctly. I asked the person who came out to check the control panel and he had electric come out. He said that it didn't matter that they didn't install it correctly, he would still charge me for the extra outlet installation, effectively charging me twice for this portion of the installation. This is complete bull. I don't know what kind of scam MyPlumber is pulling, but if you are thinking of using them, my advice is to run the other way.