Wesbank lack of service

I purchased 2 cars through wesbank. Had problems with first one and after 10 days sent car back. I informed wesbank via attorney and nothing happened. Second car i received and immediately noticed issues. Rear tyres on metal. 2 weeks later battery packed up. Got no help and only empty promises from dealer. They reset service indicator as well. I stopped my payment and informed wesbank. In that time we found sludge in engine. 2 bmw specialists had vehicle and we had an oil sample test done and it was known that this car was heading for disaster. Its an m3 f80. The deaker called and wanted vehicle. I explained issue and they took car to a french car mechanic etc. He flushed engine which i was told was not gonna solve my issue. I send wesbank many emails and no response. In end someone called and basically bul**** me to voluntary surrender the vehicles. I paid both cars for 4 months. Am still paying insurance. Dont have either of the vehicles and i paid those months. I am not impressed. Noone gets back to you and even when they do then they themselves are shocked when u prove u have sent emails