Faulty brand new 2 month old kia picanto auto

I purchased a new Kia picanto from kia bryanston. Took delivery on 16 July 2018. My brand new car has been returned to the dealership THREE times in two months for a starting issue. I demanded a new car. Kia cannot return a faulty new car to a customer. The dealer principle called me to say if they give me a new car I have to pay in R10 000.00.his reason was parts have gone up. When a customer returns a faulty product never ever is extra payment requested.