[pandrade]

i would try to have all documents whith you, all the work orders any copies of papers you sighned, parts orders, it might help if you had proof of what the car was befor they repaired by them to show "hey this wasent like this befor you got your hands on this" but usualy ( at least in florida) the shop mostly ends up winning, because they say "you sighned this and it allowed us to do this and all of that other lawyer bull crap" i would try to se if they try to solve the issue if there compleatly opposing you i would try to contact you local better business bureau and see if they can help in any way