Was sold a car that was in an accident by brenda and i was never informed, only found out now after 8 months when booking the car in for repairs

I would like to lodge a complaint againt the Ford Dealership in Rustenburg, i bought a BMW in december 2016, only to find out way later after the sale that the car has been in an accident, please note that no one at ford told me that this car has been in an accident, i found out after i booked the car into BMW as it had a lot of faults amount to R27000.00, thats when they advised that the car was in an accident in 2013 and i was never advised, i am female, i would have never bought a car thats been in an accident, for myself and my sons safety's sake...these people are putting my life at risk, cause when i booked it in at BMW in Midrand, it was about to overheat. People cannot be treated like this, we cannnot be sold life threatening products like this..