Cmh nissan durban pathetic service

I purchased a vehicle Hyundai Kona this year august 2022 and it has been giving me problems ever since with them saying they will resolve other and taking me back and forth with Hyundai Durban south.the cars engine light was on and I told them nd they told me to go to Hyundai and its been downhill from there and now the car is overheating....and it hasn't even been 6 months yet.they dont want to resolve it neither do they want to change or cancel the contract for me