Faulty pre-owned BMW

I can only advise people out there never to buy a pre owned bar from BMW Oakdene, Comaro Crossing. Jhb South to avoid deadly stress levels. Matters not how many times and how long they keep the car for fixing (with no communication at all), they will never get you a courtesy car or hire one for the customer. How are supposed to get to work and get your child to school during exams without a car for 3 weeks.??? That not being the first time it had to be taken in due to a malfunction. They don't give a damn !! Why sell a faulty pre-owned vehicle ? Does it even get inspected by AA ...how was it approved for sale?