Refusal to allow me to change my banking details - Disgusting service

I am seriously annoyed with Standard Bank. I requested a settlement letter on my Standard Bank RCP loan and was requested to go to the branch, like who still asks that you go to the branch? Then on 11th October I called them as I wanted to updated my banking details as I have moved banks and again was requested to go to the branch which I did. I sat in a queue for 45 minutes only to be told there systems were down. I left and returned an hour later and saw a consultant. They then requested 3 months bank statement however my new account was only 3 weeks old and when I was prepared to present them with a bank account confirmation letter and they refused to accept it. I now have to keep my old bank account open to incur R450 banking fees to honor my RCP loan debit order. I find it unacceptable that Standard Bank refuses to change my banking details as they have no right to dictate to me which bank account I can nominate for my debit order. I demand that you change my debit order details as my next debit order is scheduled to go off on 26th October 2024 and I refuse to go to the branch again. This is utterly ridiculous