Standard Bank Banking App

I opened a current account with Standard Bank in February 2022. I have ben unable to activate my banking app on my mobile phone which is hampering the use of my account. I have been into 2 branches, Gateway and Durban North for assistance, and the staff did try their best, the matter was not resolved. After hanging on for an hour, I finally reached the bank's IT division and they were unable to assist, but said they would escalate the matter and gave me a reference number *** with a promise that someone would be in touch with me, this was more than 2 weeks ago. What do I do? I think I have no option but to close this account.