Terrible customer service at its core.

I purchased a Hyundai H100 bakkie with them at their modimolle branch for my business, which I took delivery on the 26th of may, it had a R30 000 cash back which I haven't recieved since, I have constantly trying to get them to finalize the registration of the vehicle and it seems Mitchell Coetzer and Asti are always too busy to at least help or even give clarity on the above matter, the bakkie hasn't been serving its purpose it's bought since I don't have reg plates and that's costing me lots of money daily. This isn't the type of service I expected and it's frustrating that a dealership of their magnitude could treat their clients like beggars.