Billed for a month when I'm not in need of the service anymore!!

I am disappointed with their service. I called to cancel my subscription on the morning of the 1st because I didn't need the service for the rest of the month, that was before the payment even went through. I was then told that they need a month's notice for cancellation but when I signed up I was told that you can cancel any time. They are inconsistent and now I have to incur a charge when I'm not in need of the service, they tell you it's month to month and you can cancel at any time but when you cancel they tell you stories. I