Isuzu brutality to its customers

I purchased a vehicle via Isuzu vryheid brand new D-Max two weeks after purchase there was a pipe bust and black smoke and an engine light came on they took the car for 4 days repaired it gave it back 2 months later the same matter happened I raised it with them they took it in for another few days brought it back, a month later thier brakes made noise and the car was shaking when above 100 they ignored that a month later another pipe bust they said they will replace the whole thing and still after another 2 months it happened again and they said it again I took my car to them 5 times with the same problem within a period of a year I asked them to change this car for me they said NO if I no longer want the car I must trade it in where I want not with me that’s not their problem the owner said ****** mean stuff that I never wish to repeat claiming that our kind of people are clumsy and irresponsible, and left me hanging unfortunately I had an accident with that factory fault car and insurance helped me fix the car 6 months later after the accident gear light came on and they said it’s due to an accident and since it was in an accident they are cancelling the warranty of the car and should do whatever I want they not helping me with anything I will have to sort myself out and I should come collect my car, never been so broken called Isuzu customer service crying hoping for help and they came back saying they can’t help with all my cars have never received such service please help me.