Frustrated

I haven't been able to make calls using my Standard Bank Mobile sim card for almost a month. I can't even call the 135 number. On 30/06/2020, I got a new handset thinking that it was the problem. When I still could not make calls using the new handset, I logged the problems with Standard Bank Mobile Support on 01/07/2020 and I was assisted by Loshnee Reddy. On 03/07/2020, she informed me that the problem has been resolved and my Cell C number has been successfully ported to Standard Bank Mobile as requested. This was immediately followed by a request to review the service. I responded and indicated that nothing has changed - I still cannot make calls and the number has not been ported. Up to now the problem is still not resolved, even after restarting my phone as advised.