worst insurance ever

hi.i had car insurance from momentum.a guy hit me in the back of my car and then i took the car to assesor in pta west.after that they called and said that i have to take it to the autobody shop.i couldnt get a rental car because i have to pay r1400 deposit which wasnt mentioned then after 2 weeks of waiting for my car i am told that the assesor said they must put a secondhand bootlid on my car that didnt fit and after fighting they ordered a new bootlid like it should.who does the assesor think he is to tell the autobody shop that the car needs second hand parts?i work for my money to pay the insurance each month.it is going for week nr 3 and i still dont have my car.worst insurance ever.i couldnt take my children to school.i cant get any answers or feedback from insurance