Bad service at A-Cars Centurion

These guys sold me a car with 169000 kilos on the clock while the advert was saying 160000. They took me from pilar to post when i requested the spare key for the vehicle and never got it. They gave me an impression that the car was 100% mechanically sound.Three months later, the car requires gear box oil and they said its not their problem and they wont pay for it. They told me i should buy it from my own pocket and they will only put it in. I am not happy with their service at all and wont be referring anyone there