Follow up On Bad Service

Follow up on the bad service that I have been receiving from VW constantia from the 29th April 2015, the problem has not been resolved, the car has been with VW from the frist time that I have been experiencing problems. They refuse to give me a new car at the same cost the manager suggests giving me a car that I would have to bear an additional cost of R15000, this situation has been escalated to VW Sa and I still haven't received a scenario that would suit me. This is still going on and its been a hassle on aquiring a new vehicle or cancelling the deal