Poor services and Bad attitude

I bought Mercedez C180 at above dealer at 9000km it did not start and at 12000km battery had to be replaced. this was the old battery. Mr Ali said he was in a business of making money. The engine light came On at 10000km and I was advised by Shanin Davids to switch the engine On and Off and the fault will clear. I kept on doing this until I took the car to them at 79975km and demanded that they check it properly. Only then they fixed the problem and I had to pay 30% as per mobile-drive. They waited for the car to go out of maintenance plan. My safety was compromised. I reported a wind noise at the back doors and they never checked that because it was on Friday and the noise is still there today. I logged a complained to Mr Mooney and Linda lote customer complaint department and they never get back to me until today. The response I got from Dealer Principal Mr. Hickman was there is no completely safe guarantee of continuous and smooth operation for any vehicle. I stopped servicing the car with them. I always believed in Mercedez bens for high standard and reliable but after this services this completely changed my mind.