Disgusting service

I paid off my card in July and requested closure of it, I was told it will only be closed after 30 days, to my surprise the card is still not closed till this day. Why is this card still active after 3 months and after I have sent you numerous emails and complaint???? what is so difficult to take an instruction from a client and close this account?? I don't owe you anything! you keeping it open for what??