Violation of Consumer Rights

I bought a Chrysler Grand Voyager on the 31 November 2020. The vehicle was delivered on the 13 November 2020, and on the 16 November 2020 took it to Chrysler Dealer to check what was wrong with the vehicle and Arnold from Chrysler told me that the vehicle has a gear box problem and the leak is caused by the water pumper. I have not received the vehicle as it is still be Nissan Sandton Branch. I have send emails of Cancellation and requesting to Return the vehicle with this dealer on the 23 November 2020 and 24 November 2020 but no one taking my email into consideration of what I want. I have spoken to Steward today who is the Branch Manager about the metter but he said to me that I bought a used vehicle.