Bad Experience from Audi Middleburg

I bought a car in 2017 Nissan Almera from Audi Middleburg manager by that time was Desmond Peterson , I only received 2018 October .Unfortunately I lost the original Natis during the post office strike . I have requested Audi Middleburg to assist but to no avail the DP Hentie Cloete was very clear that , they will never assist me , I even put him in contact with a person from Centurion Traffic Department but he was still not willing to assist . I bought this car cash , the only change the car to my name on the 26/04/2019 . I cannot drive the car since the disc has expired . I have no idea what to do from here . I need help from Audi SA urgently since I cannot return the car and get my money back .From unhappy Customer MI Morabe ********** 550 . That Hettie Cloete guy is very rude and doesn't not know how to talk to the customers .