Wesbank dragging their feet prevents me from me from being able to register vehicle

I bought a second hand vehicle from a Wesbank customer on 1 October 2021. He sent me proof that he settled his outstanding amount with them on 3 October 2021. He has since left the country, but copied me on the email he sent them on 12 October 2021 (after telephonic discussions to the effect) requesting them to register the car in my name and courier the registration certificate to me. I have requested the certificate from them previously in order to register the vehicle but they refuse to communicate with me due to me not being the account holder. Their inactivity prevents me from registering the vehicle and is very poor service more than a month after the outstanding amount was settled.