NO SETTLING ON THIRD PARTY CLAIM FOR 3 MONTHS

I have been contacting Anderson Insurance since early January with regards to a third party claim on behalf of my brother whose vehicle was involved in a collision in December 2014 with a client of Anderson Insurance. I have furnished Anderson with all the required documentation and todate our claim has still not been attended to. In fact, we have not even had any feedback from them. Everytime I phone them, they say to me that their client's claim is not finalised and they can only attend to our claim once their client's claim is finalised. Again today I contacted Anderson Insurance and was advised by Charmaine Sathekge that they are waiting for an invoice from finance department to confirm their client's claim is finalised and will then attend to the third party claim. This to me is unacceptable. Why should we have to wait if they are delaying in settling their client's claim. My brother's car is used for business purposes and he is now left without a vehicle for three months. I expect Anderson Insurance to assist and finalise this claim immediately as this is unfair to us. It was their client that was at fault and now we are sitting without a vehicle.