Poor Customer Service

I was in a car accident on the 07/04/2022. On the 08/04/2022 I initiated the claim. My claim was only approved on the 20/04/2022 after I had made several follow ups. I was told that there was a delay because they were dealing with claims from the KZN floods. I was not happy with this response as my claim was submitted prior to the floods. I was given a courtesy car as per my policy, however, due to the delay caused in getting my claim processed I have to now return the rental to Avis, but my car is still with the repairers. Had Momentum Insure stuck to their SLA, I am certain that my car would have been fixed by now. Now I will be left without a car I don't know until when. Can this be escalated to senior management. Thank you