Opel refusing to repair hail damage

GOOD DAY<br> ATTENTION CEO<br> I am extremely furious about the service on my car that had went in for seat repairs and dashboard light at Kohler Auto Witbank (OPEL GM) car services.<br> The arrangement between Kohler Auto and I was to order the car seats and fix up the warning lights on the dashboard. On the 26/10/15 I received a call from the reception by the name of Marietta at Kohler Auto Witbank (OPEL) who advised me that they received the seats and I need to bring in my car to have it repaired as it's still under warranty. They have given me a courtesy car to use. It's been more than a month and I still have not received my car.During the time that my car was parked at the dealership I received a phone call on the 16/11/15 from the service manager Hennie Collins who informed me that my car had been damage due to hail stones. I do not understand why I need to be responsible for the damage. How can you pay for any damages if your car was left at the dealership? Every time I phone them they tell me this is wrong or that is wrong I think this is ********!! How can my car be damaged for hail stones if my car needed to be parked in the garage so my seats can be repaired what is my car doing o