BMW Menlyn sold me a car that was broken

In June, I went to BMW Menlyn to test drive a car. During my test drive, I noticed that the Gearshift panel was faulty. I was tild that before I bought the car, it would be repaired or replaced. I took their word fopr it, and purchased the vehicle. When I collected the car, the salespersopn said that they used "Wurth" spray which fixed the sticky buttons. I also after signing got told that the car didn't have a spare key and due to me asking for a small dicount, they cannot give me one. A month later, the buttons on the panel became sticky and non-responsive. I decided to wait until August to book the car in for service and deal with the buttons same time. The dealer I took my car to said that the panel is faulty and it's marked as out of warranty due to liquid damage. I collected my vehicle and booked in with BMW Menlyn to deal with it. The service depatment said to me that it's a billable replacement and after some calls back and forth explaining the story, I got told that the damage is new. I then collected the vehicle and took the matter up with BMW South Africa directly. After some weeks of back and forth, they said BMW Menlyn agreed to replace the panel. I confirmed with the salesperson and he said it would be replced. Booked the car in and it worked, for another month. The panel was never replaced. It was sprayed again. BMW Menlyn ripped me off, didn't disclose information until I signed and collected tyhe vehicle. Stay clear from them. It's the worst service I've had with BMW in my life.