FNB - POOR SERVICE

I have FNB Youth Accounts for my daughters. I had to make a transfer out the one account this week but could not as I kept getting an error message that the account is either inactive or insufficient funds. I contacted the bank via chat as they always advertise that you have bankers available 24/7 to help you. The person only checked my profile and then immediately gave me a number to contact for further assistance without any explanations - NOT very helpful. Finally when I get through on the number I was told that the address on the Youth Account is incorrect (old address). I did go and do a change of address last year when we moved and all my accounts were updated so why not the Youth Accounts!! I was asked to complete a form and send back with proof of residence which I did two days ago. And still my daughter's account is inactive. I've been sending follow up emails but getting no response/feedback. Tried to lodge a complaint this morning on FNB's site only to get a message after submitting that the system is currently down, please try again later...