Extremely bad service

Just the worst experience. I went into the branch at The Grove mall yesterday to change the cellphone number on record for notifications and pins. After waiting in the queue, I finally get to the collection counter, where I explained the entire situation. The lady assisted me and assured me that everything was changed. I received a notification on the new number so I believed that all was sorted. This morning I try to log into my cellphone banking, the OTP is going to the old number. I call the call center who tell me, that they can try to remove the card and reset everything. Then I'm told I'm blocked on their authentication system so I need to verify my details so they can get me unblocked so they can verify me again?? The lady tries twice to authenticate me but it fails and I am blocked again. What recourse am I given? To try again after 24 hours! I explain to her that it is a system error as I know I have answered all questions correctly.. her answer, well it works for everyone else. So I ask for a manager to call me back in the hopes that they can do something differently, after much begging and pleading and trying to explain to someone that only knows one way to do something that there could be an alternative, eventually she takes my details and says she will get her manager to call me back. I am most disappointed, as I followed the process which was explained to me, and now I am being asked why I didn't fill the correct forms out at the branch. The lady at the branch did not know the correct process, yet I am supposed to know?? I would like this resolved immediately as this is an error from Standard Bank. Please get to me asap,