Lack of customer contact and inability to close account

I've been trying to get in contact with someone at Standard Bank who can close an account.

I initially gave the CCC a call on their number + ********** 0423. Date and Time was 9 April 2019 @ 21:23pm NZST (11:23am GMT). The lady I spoke to (Noni/Nandi) advised that I would need to visit a branch in person to close the requested account where after I advised that I no longer live in South Africa. She advised she would try transfer me to the Clearwater Branch here my account is held and I could ask them what to do. There was no answer at the branch and since I spent all my airtime on the one call, I decided to send the lady that is listed as branch contact (https://clearwatermall.co.za/store/standard-bank-branch/4854) an email and included the CCC on their email address **********

My father who is still in South Africa has also tried reaching the branch via the Standard Bank Branch number and the phone just rings... This in an attempt to advise them of my email.

I've been sending email requests daily and have not had one response from Standard Bank. Not even an acknowledgement with a reference number. I've advised the bank (in the emails) that they may dial me should they require any information. I've today even tried sending an email to a lady at the Clearwater Branch named Sarah, who assisted me a while back with a query. Having only contacted her today, she's not part of this escalation. I'm noting it to show I'm trying to get a response from the bank and perhaps assist in directing this escalation...

Surely as an international bank, Standard Bank should have processes in place to service their international customers, like a team who can close accounts over the phone. The difficulty in a simple thing like receiving a response is astounding. Standard Bank, please assign someone to look into my request.