CP***MP - urgent resolution of claim

Momentum was recommended by Mercedes Benz when I got my new Mercedes. I have had car insurance with different companies for approximately 15 years - I have never experienced service as poor as Momentum Insure. It has been approximately 1 month and after their various delays on their side, Momentum will ask for further documents relating to my insurance history (which has already been provided to Momentum). Once the further documents have been provided - there is still no movement. I have made endless calls, and sent countless follow-up emails and still there is no resolution of a relatively simple claim. Indeed, I was astonished when I phoned another representative from Momentum last week and I was told that the documents I had already sent were not even registered on the Momentum system. The person who is supposed to be handling the claim is Johannah Moselane and the service really has been shockingly bad. I see I am not the only person on here complaining about Ms Moselane and Momentum's terrible service - the other complaint reads:

“I have never encountered such unprofessionalism and complacency from an insurer before. I logged a claim for both a cellphone and vehicle repairs after my car was broken into, and the handling of my case was absolutely appalling. The agent assigned to my case, Johannah Moselane, was of no help whatsoever. To say she was ineffective would be an understatement.” I agree entirely. Mercedes should definitely not recommend them in future unless they make substantial changes.