Thanks for getting in touch with us and sorry to hear you wish to cancel.
After signing into your account if you click on "My Account" and then click "Manage My Account" you should then see an auto renew option. By turning this off it will effectively cancel your current subscription and prevent it from renewing in the next month. If you wish to return to the service you simply follow the same procedure and turn it back on or simply sign in and play a movie!
Hope this helps!
NOW TV Team