Cancelling credit card

I settled my credit card bill on 12 December 2014, I then requested the account be closed. Nothing happened and they kept debiting money from account, and I struggled to get through their customer care line. I finally got through to a consultant on 3 July where I was told there was insurance linked to the account and I'd need to cancel that insurance in order for them to close the account. I cancelled the insurance as instructed. And when I called the credit card to let them know they can now close the account I was told I need to settle the amount first. I have not used the card in years and I already settled the acc 6months ago. Everytime I speak to the credit card division they put me on hold till the call gets cut off.