Be careful with cars from BeCars Randburg

Immediately after I drove off the vehicle from the shop, the rear bumper fell off, back cover of driver seat fell off, took the car to car wash only to find that the sunroof floods in water, the next day the engine made knocking sound and emitting heavy smell of fuel inside the car only to find out that there's leaking oil from the engine mainfold. I took the car back for inspection but I was told by sales agent that they are salesmen and not mechanics.