bad service and cannot respond to my query

I closed my Nedbank credit card in Feb. 2013 , the cannot reflected on my credit profile to which I requested the collection dept. a number of time to rectify and all they could do was to furnish me with an account closure letter.2 weeks ago a received an sms stating that I need to pay for this account. I called the call centre and was referred to collection, who could not help and said they would refer the account to admin department and I still have not received feedback. today I spoke to Amanda a call centre consultant who was not willing to help and said she could not verify my details after I told her how to verify she could not see/assist with anything and suggested to transfer me to collections at 17:10 pm I told her that that dept. closes at 4:30 since I was once a staff member and she continued to transferred and guess what the dept. was closed. please check the account and ensure a write off as I have used this account.