Santam lack of service.

Hello Peter, I need some guidance here please. Last November, 2021, I was in a complex in Springfield Park, Durban and one of the companies based in that complex company vehicles reversed into me. I refused to claim from my insurance and opted for a 3rd party claim. The owner of the company, Laboquip, said I should take the vehicle for a quotation to one of his friends places. I did. This company however is not an Audi approved repair shop. As Audi comes with a 12 year paint warranty, my vehicle being a 2013 Sri has two years left on the warranty. If I repair the vehicle at this shop I will lose that warranty. I needed three quotations for the insurance company and the two other quotations were from an Audi approved repairer. Those two quotations are similar and the non approved repairer is obviously cheaper. Santam is now insisting I take the vehicle to the cheaper repair shop. What was supposed to be a five week turnaround time on the claim is now going on to six months. Please help. I have given Santam all the information and advised them on numerous times that’s I only went to the non approved repair shop on their clients instruction. I have also sent them proof of Audis 12 year paint warranty after them claiming the warranty period is over.