Bad service from SMD

I bought a car online from Smd Durban on 24 Dec 2019, to date 30 Jan 2020 i still haven't received the car papers, I'm taken from pillar to post about the papers, I'm always told that they have couriered and i will receive papers from Smd polokwane, i paid them in full the same day i bid for the car on 24 Dec 2019, i do not owe them anything, worst part is that the car disk has expired, I'm not able to use the car because of the disk, and how do i sort out the disk without the paperwork?

I'm very unhappy with the level of service I'm receiving, I'm stuck with the car, i can't drive it anywhere because i will definitely get traffic fines for the expired disk.