Conman and Racist/ Worst Customer Service ever

I bght a car a mnth ago from this dealership McGees Auto. I took the car for a test drive and noticed that the car was jerking (later on found out the engine mntings was loose) the sales man said this is normal for a diesel car , there was a snd the turbo was making (later on discovered theres a hole in one of the pipes) the sales man tole me this is normal and theres nothing wrong. When I started the car , it gave a huge jerk and sometimes I had to swing a few times before the car actually started , needles to say the sales man Renier said thats normal for diesel cars. We had an arrangement that I would trade in my old car and give a cash difference and the OTP was sent to me. On the day , they said my old car has too many problems and wanted another R5k, i then settled for R3k - immediately this was dodgy , but I took the car. They said I had to do my own roadworthy , which I did , and the car failed the road worthy test. I then went back to them and they said they not going to help me. The mounting then came completely loose,I took the car back twice before they fixed it , today its broken again. Strday past I went there as i wanted my money back. Tony, the owner, told me f off