Standard Bank call centre / Branch and Personal Banker can not reach by phone

I am trying to reach my personal banker for an admin query at Standard Bank, Hyde Park. All the numbers I phone get re routed to a call centre. From there they transfer you from pillar to post. At one stage I was told that I am not a client at Hyde Park Branch, where I opened my account about 20 years ago, but at Rosebank Branch. After hanging on for an hour and being transferred from one person to another I was given my personal banker name and eventually transferred to her. She answered the phone and said she is not at her desk and will transfer me to her desk. I was transferred back to the call centre operator. Back to square one. I gave up after an hour and a half.