Incorrect natis documents

Bought a car with them cash, paid a fee of approximately R1700 for putting the vehicle on my name. To my knowledge this is known as the vehicle registration, which means you register the vehicle on the new owners name and address. The current number plate was ND and I reside in Gauteng. First off I waited a month to get my natis documents after constantly calling, messaging my sales consultant who was of no help. After receiving my documents finding out its incorrect is extremely frustrating. The number remains ND nothing changed, I phoned the call center and according to reception what I paid for is the change of ownership which is also getting a new number plate. This is extremely frustrating to be constantly calling and forgotten about within seconds after making payment