Bad quality cars

I bought a kiger turbo cvt in January 2023. The car started to have air-conditioning problems before it even went dor first service this was 7 months from brand new purchase. I took the car to them they said there is nothing wrong with the car. The car continued to give problems remember I was driving with my windows open even if it is raining. I took it again in February 2024 and they are demanding payment for the car which was bought new and still under warranty