Selling damaged cara

I bought a car on 11 September 2021 from the Jhb South branch. During the test drive I told the salesman that the car wouldn't go into 3rd gear. He took over, and told me that I'm not pushing it correctly and everything is fine. A week ago the car broke down... the clutch is broken and needs to be replaced. I was also promised the Natis documents which I still have not received. Very poor service. I would not recommend them to anyone.