Mahindra The Glen selling damaged vehicles as brand new

I bought a brand new Mahindra towards end December 2024. I've had endless problems since I bought the vehicle. I reported the problems the very same month. When you drive down a steep hill and you apply brakes, the car doesn't change into a lower gear. It remains on the high gear until you completely stop. They give the vehicle back each time telling me they do not experience the problem. January I took the car for a service at Mahindra Kempton Park. I received the car back very dirty with the same problem and was also told they don't experience the gear problem. On the 17th of February 2026, I drove the car to Pretoria CBD to start my new employment. Upon return I saw a warning ⚠️ light and I stopped at the garage. The car was overheating, the petrol attendant had to wait to avoid burning as he could not open the water gadget as it was extremely hot. I took the car to Mahindra The Glen, they asked to leave the car overnight so they can monitor. The next day the service consultant called me early in the morning to come collect the car as she did not experience any problems. I picked the car up, drove it to JHB Park Gautrain station, left the car there and took the train to Pretoria because I did not trust driving it so far because I was not convinced the problem is not resolved as the Service rep lives 5 to 10 minutes from work. On my way back home the afternoon, another ⚠️ came on complaining about the brakes. I took the car back again. Earlier this evening I received a call from Cindi advising me that the brakepads are worn out, I need to replace it at a cost of R4500. I refuse to pay that money. The car is brand new for brakepads to be worn out. I've had endless problems from the gear, to the car losing time, to everything switching off on the dashboard screen. To a screeching deafening sound coming from the speakers, to the car completely switching of at a robot or stop street but they keep on telling my there is nothing wrong with the vehicle. What do I do with a damaged 1 year old brand new vehicle