Digital Banking Gone Wrong

I have been struggling for over 10 days to access my account digitally. I am a private client with FNB. Nobody seems to know what the problem is. I am currently out of the country, so I cannot go into a branch, and it costs a lot to call in. I am put on hold continuously to "verify me", and the story is the same each time. There is an assurance that the technical department will be informed, and the matter will be resolved within 48 hours. How do I make payments in the meantime. I am promising people payments, and they are starting to distrust me, because FNB refuses to sort out their issues. I have been assured that they will call me back twice already, and they put the phone down and just do not bother. Is FNB gone too big that they cannot see to their problems. I have tried to send the private banking department a few emails to sort this issue out, with no joy as well. They keep pushing me to other departments, where I am put on hold, and verified, and then cut off, and assured etc. When it comes time to charge us interest, because of a late payment, then they do it so fast, but they cannot be swift in sorting out issues. What about all the time that they have wasted of mine?