Faulty car from BMW Fourways / SA

Hi

I bought a brand new BMW X4 from BMW Fourways on 17 February 2023. I experienced faultiness on this car 4 days after taking delivery. I then informed the dealership about this issue immediately and they have inspected the car about 5/6 times and each time i'm being told the car is fine, but i still experience the same fault. BMW SA tells me that they can't help any further because they can't see the fault, however i still see and experience this fault. Like i said this is a brand-new car and I'm paying a monthly installment for a faulty car that BMW says is fine. this is totally unacceptable for a brand that is supposed to be about quality and great customer experience. Basically im stuck with this faulty car and BMW keeps saying the car is fine, but the fault is still there.