Unreliable Dealers

My car was in an accident and I had to take my car to a dealer that Old Mutual Insure refer me to. I had problems from the beginning. Eventually they fixed the body of my car, but they used outsource people to work on my engine. I had water leakage problems from the very first time that I got my car back. I had to take it back to them and then they informed me that they had to fix the heater pipe which is not accident related and I paid for that. After that it was still leaking and I had to take it back again where they fixed/tighten a clamp on one of the pipes. It was still losing water and I inform them. Then my fanbelt came loose and we picked up that the tension pully was broken and we fix this, but I inform them that it was still loosing water. Last Tuesday (10th), I had to take my car to the dealers for the assessor and I said to them that I still had water leakage in my car. Then I took my car to them on Thursday, because there were more things that they had to fix on the body and it need to go back to the outsource dealer that worked on my engine. On Friday the 13th they inform me that my top gasket has blown. I went to Old Mutual Insure yesterday morning to explain everything to Regan and then he wanted proof of the emails and I emailed it to him. Up until now no one came back to me with and answer. For months I battle with my car and now my car is even worst off than before the accident. I didn't have a water leakage before I have the accident, so now they claim that it was my fault, because I drove the car and it got hot. This is not my fault. They should've fix my car from the beginning. Please investigate and give me feedback as soon as possible, because this is been going on for too long.