Dude, just quit. I've done deals with Ben. Total straight shooter.
You on the other hand sound like a crybaby, no nothing bitch. I've dealt with your kind before expecting everything to be perfect on a used purchase then you fuck it up and expect the seller to fix it. The fact the reverse worked until your "mechanic" blew the fuse tells me all I need to know.
I bet you fucked it up and blamed someone else.