sounds like the same problem i had with scott about a year and a half ago.
apparently the company i had bought my clutch kit from sent me a clutch disc for a v6 tiburon, and i had a i4 elantra. instead of comparing the old clutch to the new, scott tried to install it 4 times. i was without my car for 2+ weeks, getting promise after promise of when my car would be done, saying he would have a hyundai tech come look at it, etc etc.
then, when we go to pick up the car and take it to a friend of the familys shop, of 6 bolts on the flywheel, 2 were GONE, 2 were LOOSE. there we're ground wires disconnected, o2 sensors out of the exhaust (why? i dont know), and various other things that i have documented from the guy doing the work. i feel once scott got tired of dealing with me and my father, he tried to convince us he would fix it one last time, and instead did worse to the car on purpose
this was when he was out off i want to say fulton st