DISCOVERY refuses to close my CREDIT CARD _ Incurred services charges opn a zero-ed card and demanding this money_ 11 MONTH battle.

I have a credit card with discovery. Due to the exceptionally high service charges, I choose to close this card last year Nov 2016. At this point I zeroed all the charges which were the service fees only, I called the call centre, I was met with the most unpleasant agent , I filled in the form and sent this through via email. I was informed I would be contacted in two days. This did not happen. I called in again and was spoken to very rudely by a call agent, I was told that I did not send in the form and I must do this. I resent the document and again no feedback and no account closure. In the interim discovery started loading on service fees and interest. I called in again and spoke twice to a manager email ********** who assured asked me again to resend and assured me she will address the issue in 24 hrs. Again no feedback and she is not responding to any mail. The service fees and interest in 11 months since and many calls later is over R 800. I have refilled and resent another closure form on last week and I advised that I will not be paying their additional charges since I requested closure 11 months ago. They sent a message saying I must settle their service charges on my account. the call centre maintains their ignorance and rude attitude. I have had no calls from discovery and I still have no closure of this credit. I do not want this card, nor their services. This is appalling that they refuse to close my account, they incur services changes and then demand this from the clients. This is really a very poor method of trying to get money out of people. and the worst service I have ever received including on manager level.