Poor service

In June I hit a paving stone with my car. Both right side tyres and mags were damaged. I have a value added package to my policy for the tyres and mags. I lodge my claim with them on the same day. They requested that I go to tiger wheel and Tyre in edenvale for them to take pictures of the damage and to log the claim. From then I have no feed back from them. When I call dail direct they keep on telling me different stories like they have not received the assessment from tiger wheel and tire to that the claim was finalized but they can't tel me what the outcome is. This morning I phoned them and I was again told that they still awaiting for the assessment. This is absolutely unacceptable. I have not missed one payment on my policy and I did everything they asked. Now the one tyre that still kept a bit of pressure is also beyond saving and I am left with a car where I have to inflate the tyre on the highway everyday. What can I do as I am seemingly paying insurance just to be kept hanging when I need their services.