Car disc delays creating a serious problem for me.

Good day, What started as a nice transaction has now left me frustrated. Hyundai was quick to phone me when I was purchasing a car but now they don't answer my call nor do they return my calls. I have been waiting for a car disc and up until today it has not been delivered. What is more frustrating is that no one can tell me how long it takes to get a car disc. Can someone help me urgently.