Vehicle registration paid - but owner's responsibility

I bought a Tank 300 2.4L Diesel from Centurion GWM. I stay in Hartbee****rtdam. GWM issued the temporary licence which expired 20.11.2025. I paid R3 500 for licensing registration and number plates, which the dealership promised to give me before expiry of the temporary license. I have not heard anything from them and then started following up a week before it expired. They still up to 19.11.2025 promised me to come to North West and register it. Now they told me on expiry day, they will no longer be registering my vehicle and that I need to sort it out myself and send them the receipts whereupon they will refund me afterwards. With the expired license disk, my car is not insured anymore. I need to take a day off work to register the vehicle myself. They only will refund me the money I paid and not the full R3 500 that I have paid. they are making money off out of this. They did not give me any natis or registration papers from their side. I need to figure out how to register this car on my own in a different province. This was the worst after service I have ever received from a car dealership on the purchase of a brand new vehicle. They take their commission and the rest is up to the client to sort out. Very very unhappy.