FNB customer service Revolving Facility error 217

I have a revolving loan facility with fnb. They deduct money from my main account every month. I can then transfer the money to my main account is need be. The revolving facility shows funds available but i cannot transfer money anymore. it gives a error code 217.. I've called the customer care and went to the branch in George Garden Route Mall. I received the following mail "Good day Miss Ruiters

Please see the message below from Meagan Feldman...

Good day Johan,

Please note, due to the recent unpaid and excess as well as RF being in arrears we are unable to lift hold."

I rep**** and asked for further help as i don't understand how i can be in arrears if money was deducted from my account for the RF. It also still shows there's money available but i still can transfer it.

fnb customer service is poor as they do not respond to mails. I need further assistance please. I need to access they available balance. Id prefer contact via email as i am at wor during the day