Mtn *****ing from me every month!

I have been trying to cancel my Mtn Month-to-Month router contract for 2 months now with no success. I did everything I was told in order to cancel this. I've been emailing and calling with numerous reference numbers but I just can't cancel this contract. At this rate, I will have to close my bank account just to stop having Mtn ***** my money. Don't open a contract with these guys you will never be able to cancel it.