Unfair dispute on third party claim

My car was bumped by a person who was insured with IUM. He bumped the car at a parking lot where my car was stationary and he reversed into it. I do not have insurance for it.

He contacted IUM and opened a third party claim. They contacted me and requested 3 quotations, which amounted to R+-33000. I sent the 3 quotations to IUM, mind you, I had just bought the car and needed to do a road worthy certificate for it. When I went to do it, they told me they cannot certify the car because it is damaged. This was in 2019. I have been making numerous follow ups with IUM until last week when they told me on the R33000 quoted by pannebeaters they can only give me R9000.

At the moment , I am sitting with a car that cannot be driven because it is damaged by their member . I cannot do a roadworthy certificate and hence cannot renew license disk. Can somebody PLEASE help me. I am dealing with a rude lady by the name Nonhlanhla Msenga from IUM. Please please if this can reach someone to assist, I will be more than grateful