Atrocious Service regarding receipt of Natis document

I have received the most atrocious service from Wesbank, despite using them as my vehicle finance house and banking with FNB since 2009. Once my vehicle had been settled, a payment was made for change in ownership, as provided by Wesbank, which was never done. Since then I have been attempting to acquire the duplicate Natis document from Wesbank, as, since the ownership was not changed as requested and paid for, they are the only ones who can request the Natis. This required a payment of R440, which was paid and proof of payment sent on 28 Jan 2022. I have since sent numerous emails and spoken to a very unhelpful call centre agent. The emails take at least 5 working days to reply to each time, and each time have received various responses such as proof of payment can't be traced, after resending 3 times, an address is required, which appeared on email they are responding to, wrong payment amount received etc. The sale of the vehicle has fallen through, and to date, the Natis document has not even been requested from DMV, according to last email received. I would advise financing your vehicle through another finance house and steer clear of Wesbank