Bad service

I purchased a vehicle on 13 March 2019 at the Midstream branch and I was promised that the car registration papers and plates would be delivered to me within 21 days. I have waited for an sms for over that period which was indicated. I have been communicating with the agent whom I made the deal with by the name of Mynhilda and she gave me a run-around and false hopes. I sent her whatsapp messages expressing my frustrations and annoyance. I even lodged a complaint on WeBuyCars website but no one has responded to my complaint. I then went back to the agent in question and requested her to give me the number of the person who is responsible with the registration because I wanted to find out what was the hold up. When I called the lady by the name of Beuke who is apparently working for the traffic department, she also gave me a very lame excuse but ultimately told me that she only recieved the papers yesterday and that it might take longer than 21 days to register the car to be registered in my name, of which I think is odd. I find this very patronising.