Cry for help

I hope this complaint reaches someone from the bank who can genuinely assist. My life life has come to a standstill because of a credit card account (which I last had in 2007) I supposedly owe, and FNB can't even say how much I owe, let alone provide any details concerning this account. They only thing I have been given is a card number. This is now affecting my credit applications and hoping FNB can deal with this as a matter of urgency so my pending applications can be processed.