Unapproachable for NATIS Document

Wesbank are very quick to lend you money to buy a car, they are quite happy to profit from the interest that you pay back every month. And when you finally settle the loan and need the NATIS document for change of ownership........... They are unapproachable. Its been 6 weeks now, iv sent email after email. I have tried using the app. I have tried the call center........ Nothing works. I own the car but I can't sell it....... Is there someone who can help? The service received is awful. Im going to move my other vehicles from wesbank