FNB worst service

I have been with FNB for over 20 years and always overlooked a lot of minor issues I had in the past. Today was just the worst, having my account blocked due Fica/ Tax update that was " not done" when I went to the branch twice and was assured that everything was sorted. I have had my account blocked twice since then. The secure chat is the worst, I spoke to Nomshado earlier this morning who **** to me and said it was a system issue that FNB was experiencing, I called FNB 4 times and was transfered from pillar to post where I was advised that my account was blocked as my tax details were not updated. I spoke to a Hilda who gave me the incorrect number to contact the "correct department. I went back to the chat and spoke to Thobane who left me hanging with another incorrect number, i had to instruct him to get someone to call me back. That person called twice but said nothing.

I had to call FNB again..... and was eventually assisted by Sanjeev who assured me that it will never happen again. How do I trust this bank when I have been inconvenienced so many times as a loyal client. What will make it different in the future?

What will FNB now do to rectify this situation?