No response on the claim

We got the claim number on 13 September 2019, till today the car is still with the panel beaters. I call almost daily and the person assigned to the claim always promises to call and give feedback. Until today there has not been a positive feedback. I called today, I was promised I will get a call back from the person assigned to deal with the claim complaint but I still not receive the call. The people from the dealership sent a message that they are still waiting authorization. This is really inconveniencing because the car has been gone for such a long time. How long do we have to wait for the car to be fixed?