CMH can't do their job

I bought a car from CMH East rand in April. When asking for my disc, they had all kinds of excuses. Phoned weekly and was then told the car must go through road worthy again. So in July the car went through road worthy. I was told to fetch the disc in a week. When I phoned to ask if it is ready, no one knew what I was talking about. It is October now and still no licence disc. I was then told last week by the manager, Chris, that I should go to the licence department and fetch it myself. When I bought the car, this was stated as one of the services they offer. I had to give them copies of my ID again since they lost my file. Yesterday I phoned to ask when it will be ready, the manager (With his very disrespectful tone) told me they should have phoned me last week to ask for a proof of residence and that they are doing me a favour, but it was stated as one of their services, so they are indeed not doing favours, they are just doing their jobs, which they are not very competent at. I want my admin fee back, since I paid for a service that they didn't deliver on