Charged for closed account

I zeroed my balance on my credit card. Once the balance was confirmed as zero I phoned the call centre and closed the account which was confirmed as closed by the call taker. A month later I still received a statement and noticed that the account was still open and that Bluebean has charged me over R300 for default administration and other charges. An email was sent to them which explained all the circumstances asking them to reverse the charges and close the account.<br> <br> The email was not read correctly as I received a reply stating that I need to pay the balance before they can close the account. I have asked them to read the email properly and escalate to supervisory level but have not had any respons.