Zenith Auto doesn't care about their customer, only cares about money

My name is Dina and I bought a car from Zenith Auto dealership on the 9th July 2022. The name of the car is Polo TSI 2016 model. I bought the car cash and the car is giving problems and when I spoke to Henry the Manager he told me that the is nothing he can do. I bought the car cash for R90 000 it hasn't been two months but the car has a funny sound from the gear box and when the speed reaches to 100 the car is shacking. it is not save driving that car and I am honestly not enjoying the car. again on the driver's door the is a space on the window each time I take my car to the car wash the driver seat is always wet and I'm worried that we now approaching rainy season and I will be wet while in sitting in the car.