Inspectacar gezina horrible service

Hi guys, first time buyers, avoid dealing with this dealership at all cost, I met a guy on cars.co.za, his name is Viendre a sales guy working for Inspectacar gezina, the guy showed me a red bmw 320d m sport, pictures and everything, told me the car was ready, I went there excited, signed the contract, on the time of having to drive the vehicle I realize the car is not the car on the pics, the issue was promised to be resolved in a week's time, waited for more than 2 months now, anyone know how to cancel such contracts cause this dealership is horrible, I still dont even have plates on this car, nearly got arrested for driving without plates and an expired permit