Bought car with no Natis documents

Bought a car for cash that was on auction on 19.12. 2022. Waited over 2 hours to take delivery of my vehicle at the Richmond depot in Cape Town. I was told that they would register the car in my name for free, where after they will SMS me to collect the Natis documents. It's been far over a month and still no word. I've called customer service on numerous occasions. Each time they say they will email the Natis department. I've sent numerous unanswered WhatsApp messages to the person that helped me on the day I collected my vehicle from the Richmond depot, and also a number of failed calls to the same person. In the meantime I've spent thousands to get the vehicle roadworthy ready, but can't do anything without the papers. I'm stressed beyond belief!