Worst Claim experience ever!

I had a car collision and submitted my claim on 18th April. On 20th April I received a courtesy car from Avis, an added benefit that I am paying for every month. Discoverer Insure took my damaged car to their preferred panel-beater, Eljoney Body Works in Pretoria. Ok, all looked good, or so I thought. Discovery only authorized my claim on 30th April, that is 10 days later. As if that was not enough, the actual repairs on my car started on the 12th May! So it took 22 days from the time I claimed, to the actual repairs! During that idling time, I had a courtesy car on which maximum rental days is 30 days. I was not too worried then, as they said repairs would take 5 days. On 26th May, I paid excess, and proceeded to collect my car. To my shock, it was incomplete. The windows were not rolling up or down, and Johan from panelbeaters said they will take it to VW agent. It is for this 22 days delay that I requested to have courtesy car extended, but sadly, they sent me to hell. Ravi Jadoonandan and Thobile Nqotheni took the word 'useless' to another level! The only thing they're good at is: \it will be from ur own account". I am not taking this lying down!"""