Handed over account

I am really upset with The Hub. I paid up my account in 2013 and haven't used it since. But since last year I have been getting calls that my account is in arrears. I told them I don't understand why its in arrears coz according to my knowledge its paid up.<br> Late last year some attorney office started calling me telling me that Nedbank has handed over my account.<br> They suggested its because of some club I joined which I don't agree with because I don't receive a club magazines.<br> Now I don't know what to handle this because its denting my name on the credit bureau.