King price do half work but charge us full premiums and say coz the car is old

We've got a 2002 Audi A3 1.8T. I was in a accident the panelbeater's work was perfect. They wanted to put Poirot parts on but luckily the pirot bumper dont fit so the got 1 of Audi. We got the car back 5 day's latet the radiator fan cought fire we put a new one in and they refunded us but from the accident the computer screen in the center of the instrument cluster is not working they telling us now coz the car is old my insurance got put up more than R400? What to do about the computer screen?????