Refusal to close off a paid up credit card account

I paid off my credit card 2 months ago and had requested the account to be disclosed...I was shocked to receive a text stating that I should pay finance charges by the 8th of December.

I then called the Nedbank carf collection division to get the matter resolved on the 7th of December and was assisted by Siyabonga Magagula who assured me that the finance charges of R350 will be reserved and will be notified by an sms within 48 hours of the account closure.

I am still receiving the text that I am owing Nedbank and my query has not been dealt with even after calling the card collection division.

This is annoying because the account was supposed to be closed 2 months ago. The service is just poor and Nedbank just wants to milk clients off by not closing the credit card accounts when requested to.