Worst Car Insurance!

I was rear-ended at the end of January 2022. I asked for claim forms and received them a few days later. After filling in the forms, nothing happened until I called them for an update. After the car assessment, there was another long wait until I called. The car was eventually booked in for repairs and I was offered a rental car for 15 days when my policy states it should be 30 days. When the 15 days expired I had to call Momentum to extend it to 30 days (wasting my time and money). When I was called by the panel beater to fetch my "repaired" car, I found out that my rear bumper was still rattling and the rear lamp was a used part and didn't look like the other rear light. Now the panel beater says they will order a new light and I will have to wait for 3 months for this part to arrive. My rental car is die back today - what am I supposed to do for the next 3 months without a car? Why did you authorise the replacement of an old part in the first place? Next week will be 2 months after the accident happened.

I have 3 cars, home contents and building insured with Momentum. I will certainly be moving all these to another insurer after this! In all my years, this is the worst!