No way to reach someone for information only the bank can supply

I have an international inbound payment from myself. From an old UK bank account, when I used to reside there. It is not an investment, no interest has accrued. The bank wants a BoP code to release the payment and I don't know which one to use. The international service desk number *** does not work. Emails have been sent to the following without reply *** *** *** *** I've escalated through the Standard Bank app chat and the chat was terminated by the agent, Lesego, before she resolved the situation. The next agent, Samkelo, is unable to see my previous chat, which is a waste of both the bank resources and my time. When I said I wanted to make a complaint, a simple reply takes 6 mins. No ownership, not even a 'please wait', nothing. Eventually, he said a complaint was logged.