Disappointed.

My wife purchase a Fiat Bravo t jet at Top Gear Auto 5 months ago.the vehicle had problems with the body and so the mechanical parts on the vehicle. so the dealership said they will fix it if we purchase the vehicle.so we bought the fiat and they fixed the body work but not the mechanical parts the vehicle came back not fix we send it back again.same thing came back unfixed.long story sort vehicle still today not fixed after 6 times of returning to the dealer. To add on the dealership gave us 2 ******* permits (got copies) and the roadworthy of the vehicle was done twice *******.because the vehicle was in our property the day the roadworthy was done we phoned the testing centre and the manager confirmed that the roadworthy was done without the vehicle. We phone the Head of ABSA where the vehicle is financed from to reverse the deal and he said we must Ask the dealership to reverse the deal from there side. So we did ask the Manager Manie and the refused to do so.he said he will fix the problem still today no luck.I phoned Nick the Head office Manager for assistance to reverse the deal still today no response. please help me with his matter.