Bad service from car dealership in Stilfontein ( North West province)

I bought brand new car in 2023, two weeks ago I experienced a window which is not closing ( I can’t drive the car) went to them, confirmed that there’s a damaged part on the window, ordered and warranty approved, and it will be delivered in 7 working days, I called on when seven days passed and they told me the company or manufacture has a courier problem , however they couldn’t tell me what problem it is., I now can’t drive my car which I am paying close to 8500rands monthly excluding an insurance, I need your assistance