Nedbank not closing my account,after paying it off and asking them for over a month now

I have a credit card with Nedbank,which ive asked the consultants to assist by closing it because i nolonger need it,day one they phoned me and ask me to deposit certain amount for it to be able to be closed which i did,everyday i have to call and ask if they working on it and y it is taking time,they now asked for my account number since the money that was on my credit card was too much so it needs to be deposited to my bank account,fine i did that which was 3 weeks back,every 4 days i phone for follow up and there is nothing or no sign of my account being closed.My issue is that my credit card is active and ive been paying for fees that come with it,which im trying to avoid by paying it up and close it.When i call the call centre and go to the branch no one has answers instead they keep on saying we escalating it and i cant be transfered to a department where they will give me answers.Am i forced to have credit card with Nedbank?Why are they not closing my account,i have reasons i cant afford it so close it,the next thing il be on arrears and you will be very quick to harass me with call.Please close the acount