Not able to use the phone app like I always do

I am frustrated that its the end off the month and I must pay my accounts. I tried to use the banking app on my cellphone. This is how I do it everyday. Today it wanted me to register for a OTP using my cellphone number. I did this, several times. The message kept saying I am not registered for this service? then I have the option to skip...I do this. Wanting to load a new account payment. OTP is sent to my phone. I enter it just to be told phone the internet call centre. This i did after holding for about 15min. I am then told that my profile can't be found on the system. I am then told to register for cellphone banking using the old banking centre? I told her that I have not changed anything and use this app on a regular basis and that I am not sure where the old banking app is as I have not just uploaded the app? I am frustrated that the end of the month Standard Bank has an issue? Why is it up to me to phone around to sort my issues out as the call centre tells me they don't know why I have an issue. This is not good enough!