Account frozen due to FICA - where's the warning?

I have been a FNB customer for about 15 years now and have always been happy with the service. The recent FICA updates however, has been done very dissatisfactory. On 23 Nov 2023 I received a message that I need to update my FICA docs and that same day my account was frozen (while I am travelling between Johannesburg and Cape Town!!), but not once was I warned that my account can be frozen if I do not attend to this and also, who gives their customers a few hours to action this - we all have jobs during the day, you know. In addition, I logged into my online banking account and nowhere could I see what the reason was for my account being frozen or even that it was frozen - how can this be?? Experiences like this does not make me a happy customer and causes a lot of inconvenience with debit orders now bouncing this time of the month...really FNB??