BIDVEST MIDDELBURG AUDI CENTRE

I have purchased a car from this dealership a white F30 BMW, Part of the ROA i have signed stipulated that the delareship will be liable for any cost should the vehicle get a breakdown within 30 Days, a week later after the purchase the car started showing a Drive train warning light, I took the car to BMW Polokwane they did a key read and it was discovered that the car turbo had died and the fuel system also which resulted to the car losing power and not performing as it should, i took the information from the key read from BMW and send it to the Dealership through sales executive that assisted me Vuyisiwe Mabhena and he refered me to his manager George Van Der Merwe which outright without scrutinising the information provided rejected our claim and even flexed muscles by saying we can go where ever we want to Bidvest has power theres nothing we can do

All i need is advice as to who should we approach and where should we go if a dealership is committing this kind of crimes against consumers simply because they are BIDVEST