TERRIBLE CUSTOMER SERVICE AND BAD COVERAGE ON ONLINE BANKING

I have a flexi bond with FNB, of which at anytime I can draw out funds from my extra payments. For the past week, I cannot get access to my money. It is continuously giving errors. I did chat to one of the consultants at FNB via secure chat, of which I have asked why this is happening. I was told that FNB is issues. So I have asked when will it be rectified, and the chat was cancelled. FNB, I need access to my money. When will this be rectified. Is there someone at FNB that can please assist????????????This is really bad customer service, from a bank that insisted that I join them a couple of years ago....