Best Wiring Repair in Raleigh NC

I had an outdoor faucet that needed to be replaced as it was broken.  The replacement works great and the work was top notch.  They had to move my hot water heater away from a wall in my garage (they moved it back afterwards) to complete the replacement.  The only thing keeping me from giving 5 stars is that the cost to move the hot water heater was rather high.  I'm happy to have the problem fixed but it seemed rather expensive to me.  I would still recommend the service.

I called Blantons to come and look at my tankless hot water heater that wasn't giving out hot water. When I called, they told me there would be a $116 service charge and then possible charge if something needed to be fixed. Of course, I understand that.
The technician comes out to my house, takes a look at water heater, breaks a lever on the box next to water heater. Connects a loose wire. Technician was there less than 40 minutes. Then he comes around with his invoice and he charges me $360 for diagnostics. Never told me prior to doing anything that it would cost this much. My total was $417, for less than 40 minutes of work. He also put in the invoice that he diagnosed the problem for 45 minutes and then took 30 more minutes to fix. Not true, I have it on my cameras and I stayed with technician the whole time.
I paid the bill because I didn't know what else to do. I immediately called the company to speak to them about this matter, was asked how much I think I should have to pay. Then was told that the manager said I shouldn't have paid and he can't give refund now that I have already paid but he would give $50 credit.. no thanks! I asked to speak to the manager and he conveniently just left to go to the field, he was supposed to call me by end of day and surprise.. he never did.
I would never recommend this company to anyone. Terrible customer service and seems like they adjust their prices based on what they think they can get away with.