Brand new vehicle NUMEROUS FAULTS

I have purchased a brand new Grand i10 2022 8 months ago from Hyundai Pinetown, I have experienced numerous issues on it which gets worse and worse, i have sent it back almost 5 times now and they are unable to diagnose it, the issue gets worse and yesterday it almost costed me my families life when the car died on the road and the steering became stiff, This is unacceptable, Mark torrance refuses to help, Farhad doesnt call me back, nobody gets back to my emails, I am just tossed to the side and I dont know what to do at this point, there are way too many factory faults for a brand new vehicle, it is only at 5000km at the moment, I AM BEYOND DISAPPOINTED!!!