You can't cancel accounts here, and until your account is actually closed, you are responsible for payments.
To cancel, you will need to call 866-347-3292. You may have to pay an early termination fee if you're still under contract. See http://legal.hughesnet.com/ServiceTermsAndConditions-current.cfm
To avoid equipment charges, you will also need to return the equipment (modem, power pack, and the radio from the dish). You will get a kit to return the equipment when you cancel the account.
The instructions for removing the radio are here: http://support.hughesnet.com/sites/support.hughesnet.com/files/inline-files/1041328-0001_b_0.pdf
They'll also be included in the return kit.
@Keysguy , When you're ready to cancel, call the
800 toll-free customer service number. That's the only way to cancel your account.