Auto & General dumps cars at panel bearters and owners are left in the dark

I was involved in an accident. Auto and General towed my car to a panelbeater of their choice. I was not told how long it will take the car to be fixed. The car was towed there on the 17 August 2017. When I checked with the panelbeater as to when will the car be ready, they said 29th September 2017. Meanwhile, my courtesy car is for 30 days, which ends on the 13th September 2017. When I called Auto & General to ask them when the car will be ready, Millicent (the lady a spoke to on the phone) said it will take 20 days. but when I check from the 17th August - 29th September is more than 20 working days. I then told her that they have to extend the courtesy car return date to the date when my car is ready. She then told me that my claim was too much, their rule allows for 30 days. She also said I could have taken my car to a panelbeater of my choice, to which I responded that I was not given that choice, the car was just towed to panelbeater of their choice. Auto and General, through their employee Millicent, are inconsiderate, reckless and only value our premiums. I could have left them four years ago after my first bad experience with them. Now is de javu, the same problem, they dumped my car at their panelbeaters and expect me to wait forever and meanwhile they want the courtesy car back. I will definitely leave them because they gave me bad service twice and their employee have a nerve to tell me that my claim is too much.