My car went there fo...

My car went there for hailstones damage and they damaged the control unit and the sunroof got damaged while their auto electrician was trying to fix the control unit which ended up at bmw where it was confirmed that the control unit was liquid damaged now they don't want to pay for the repairs saying that insurance should pay while they know that insurance says that the repairer is responsible for the damages which occurs while the car is in his possession i want Agape to give me back my car in the condition that I gave it to them.