WE BUY CARS - TERRIBLE TERRIBLE SERVICE

My son bought as car from WeBuyCars for R110 000-00. Three months after purchasing the car, the car was cutting out. On further investigation at a mechanic, it was noted that an electrical piece in the engine had actually been "glued" together so not sure how this car even passed an inspection. On complaining to We Buy Cars, we were told that it's not their responsibilty and simply forwarded us the papers showing that we bought the car as is. This is absolutely unacceptable, when a 19 year old, saves money for ages and then lands up not only paying that amount for a car but has now been quoted an additional R25 000 to repair the car, not even four months later. DO NOT BUY A CAR FROM WE BUY CARS!!!!!