The Apple Xchange

I bought a used 2018 Mac Mini from The Apple Xchange in Tempe. August 2020. In full disclosure, I am a Master Electronics Technician with 20 years of experience, I can repair a PC along with many other more complex electronics, so upgraded the RAM in it myself, with 64GB of Crucial RAM. The Mac Mini has been running powered on as a headless unit and running fine until the last week of February 2021. I went to remotely access it and could not. Went to the server rack in my home to check, no light in the front, mini was off. Turned it back on got the boot chime. Tried to get in again, no luck. Pulled the mini from the rack where it sits next to my other Mac mini and hooked it up to a monitor, Gives me the boot chime and the Prohibitory symbol. No go, I try and get it in to recovery that doesn't work either. Now I just get the file folder with a question mark. Finally, I decide to bring it back to where I bought it since it has a 1 year warranty. After initially trying to charge me the diagnostics fee for the warranty repair and the kid at the counter acting like a snotty Genus Bar employee, I started to get a bad feeling about this shop. A couple days later Alan calls me to to tell me they are still trying to diagnose the issue. Four days pass, I get another call from Alan, he starts questioning me about the RAM upgrade and then starts to try to tell me the logic board is damaged from it. Lies... Then Alan tells me they are not going to repair it under warranty and that they have to send it to the real Apple anyway because they are incapable of doing so. All this to try and get out of their own one year warranty. If they don't want to honor what they say they shouldn't offer a warranty. I still have yet to see proof of this damage even offered to me. This place is starting to sound more like a car dealership warranty to me. So, I picked it up from the shop, said some very unkind words since now have a $1000 paperweight. Got the Mini back home and trying to figure out how to get it repaired, I repeat my tests, Trying to run Apple diagnostics, or boot into internet recovery, I can't get the mini to join WiFi, well that was for sure working before Alan opened the chassis. So I went in for surgery, low and behold the connector for the WiFi antenna is not properly seated on the logic board... I don't know if this was intentional sabotage or an honest mistake. Called the shop back and spoke to Alan and told him they failed to connect the antenna properly. He starts going into a tyrant about how the connector was damaged when I brought it in. More lies... (notice how I never said anything about damage and he starts throwing the "d" word around anyway) The TL;DR of all this is go to buy a Mac or have it serviced somewhere else, Alan is a man of no integrity and neither is The Apple Xchange.