Terrible business banking customer service!!

As a long-standing FNB customer, I experienced the most terrible service today and I am extremely frustrated and disappointed. After talking to two different private bankers and then another 5 different call centre agents (I spent 25 minutes on the call with the various call centres, being transferred from one department to the next), I was told to go to the ATM to change my online banking contact number. Then I get to the ATM and there are three profiles without any aliases ... how should I know which is which? I change the first one, thinking I will just go through them systematically ... to my surprise I couldn't get back into that option - it was ghosted. I still don't know if my contact number is now correct on my business profile (I am suspecting it's not), after wasting half an afternoon. Honestly team FNB - this is not on!!