Terrible service from Stanlib

I have recently moved country and have been trying to change my email, phone number and address with Stanlib. What an utter debacle. I initially contracted them on 27th May 2023 asking to change my details. Since then, I have had 11#Response /Reference numbers and 4 Case numbers and my simple request has STILL not been done. I have also sent in the Change of Details forms TWICE, had 2 phone calls from them, and STILL nothing. They then sent me a mail saying I had not said which email I wanted them to use, and they wanted a fica address. I then RE-SENT them my page that said which email I wanted and RE-SENT them my signed and stamped bank statement with my address on, and today I received a mail to say my case has been closed as they tried 3 times to get hold of me and could not. Short of me flying back to SA and closing this account I am at a loss of what to do next. It is has felt like I have been dealing with a nursery school. Shocking response. I have also asked twice in the last week for someone to phone me. I cannot change my phone number on this page - it is now +***