Claims approval is poor and no support what so ever afterwards

I had an accident on the 10 of July 2018. It took them the whole month to approve the claim. Then they took my car to renew it -Greenstone that offers the worst service. It's reviews are all poor. When I call to complain they told me I need to take it up with the service provider. There are so many renew it service centres much closer to me in Randburg and Sandton, they decide to take it to the worst one. My claims officer Surishnie was not helpful at all she kept giving me excuse after excuse. It's the 13th Of September and I still don't have my car back.