********* practices of repairs

My car was taken to them for repairs through insurance. They inadvertently wrote it off because insurance would not accept liability for a quotation subject to change. The horrible service came at the expense of them damaging a part during stripping and then attributing it to the quote. I have raised this issue with them with empirical evidence of their damage and they proceeded to tell me that they are on it, I have received tickets waiting. No care is put in cars from wrecks, they will damage other components and claim it is from the accident. should I have not taken proof I would be a victim.