TRYING DESPERATELY TO CLOSE MY DISCOVERY CARD

I have been trying to cancel my Discovery Card for 2 months now. Either no response to emails or very late response. First it took over a month to cancel the Card protector insurance, which I was told had to be done before the card could be cancelled. And still I wait for the card to be cancelled. No response to emails and now 2 months worth of fees have been debited. Very quick to send me smses to remind me a minimum payment is required - the only amount owing is the fees they have debited due to the NON Action for 2 months.