Failure to cancel credit card account

I closed my nedbank accounts in August when I moved to another bank.<br> My cards were taken from me at the Rosebank branch and destroyed.I had earned greenbacks on my credit card account and had never utilised it.<br> In january I received an sms stating my greenbacks balance , i logged onto the sight and made a purchase.<br> I called a week later to track the purchase but was told that my credit card was in arrears with finance charges incurred on the account from august to date. The consultant told me that she will put through my purchase from her side but cannot assist with the unclosed account , I would need to go into a branch.I was livid. Why must I go into a branch for something that was not my fault.I got an sms fron Nedbank a few days later asking me to urgently settle my credit card. I called credit card division and a gentlemen kindly assisted me with much efficiency.I called the greenbacks division today and was told that my parcel was only eligble for delivery from the 6/02/15 as that is when my account was cleared and i would have to wait 14-21 days from the 6th for delivery.I think that that is ridiculous and unfair as it was not my fault that the account wasnt closed!!!!