Car overheating

I bought a car with at Jeandre motor dealership at kempton Park at 31 October 2018.BMW X6 finance by Wesbank three months after I bought it I experienced the starting to overheat matter was escalated to the dealership and bank with no help..

3 years down the line the car is now very very bad and still paying the car that you cannot drive. I spent and spent and left with debts

Matter was escalated to Jeandre and FNB with no help. I am owing the car which is already a s****