Needing to cancel MYOB subscription, can't where to do this.

you have to laugh, I have tried to cancel for 2 months and no one is contacting me. I had to go to the bank and change my credit card so that MYOB stops deducting money, they are still trying on the new credit card. I hope the bank recognises this and flags it. It says pending but I don't think MYOB will be able to take money out as I had a dispute and got my last month back.