Without my knowledge, a mechanic did not mount and ground an electrical component using the appropriate hardware. Instead, the mechanic used zip-ties to fasten the component. I discovered this when a month later, my vehicle began to misfire and lose power. A diagnostic revealed that one of the zip-ties broke and the component was dangling. The mechanic said it was an aftermarket part and the hardware didn't fit. The auto shop refuses to refund the money for the repair, but has offered to repair the vehicle. Given this is a shop that cuts corners, I do not want them working on my car. Do I have any basis for taking the shop to small claims court?