Post Collision help.

My car was tboned two ago. Unfortunately, i only have liability insurance, and i was at fault. After collision, the towing company took my car. I was naive, so i asked if they could help with repairs since they also have an autobody shop. They gladly said yes. The guy opened the two damaged doors and promised to give me estimates the next day and then the next day and dragged it on almost two weeks now. He keeps saying he can't find parts. He already told me he's going to charge me tear down fees and storage fees by day. He keeps saying he can't find parts, and clearly, i will incure the storage fees until he can't find the parts. I don't know what to do or how to handle this. Any suggestions? Any dos or don't from your experience here in houston? It was a prius 2012, btw.

None the less, everyone, don't be an idiot like me if you get caught in such a situation.