CREDIT CARD

I have been informed by the transunion on my credit report that I have a credit card with Nedbank which is in arrears for over 11 months. I called Nedbank to enquire about this credit card and I have been transferred from collection to legal and non of these guys can actually tell me who's handling this account or how to get it resolved. they say it reflect on their system but they don't know whom to contact in Nedbank to get this whole issue resolved and even if I want to pay they don't even know where or to whom should I pay it to.