Dont care for there clients

Hi im a nedbank client n dealing with them for years but its my first time getting car finance with them and i complain too them abt Imperial Ford capetown for selling a broken car too me since i got the car in December i havent even had the car for a whole month in my care as the car is always in for fixing and this course lots of stress in my marriage i told them i want to end my contract ive contact the motor ombudsmen also but they recommend me writing too the national consumer commission im really sick to my stomach