i need HELP anyone who can help me fight webuycars to fix their mess on my car

I bought a clio 4 @55000km from Jantjies at WebuyCars MIDSTREAM, with a complete service record. upon purchase, the dealership insured that they void the manufacturer's warranty and service plan of the car buy removing the flow pipe seal to the turbo to expensively gradually damage the car and make sure there's no warranty to cover the damage costs. is it because i was black i didn't deserve a reliable car, or is this how WEBUYCARS treat all the customers? till now i don't know who to turn to