Looks like you had a lot of issues with your account. It's a pity you didn't choose to come to this tech community earlier. The account default is money gets deducted from the account you signed up with. The invoices are available online for you to see. If you want a paper bill, then you have to pay extra for that service. This is all in the service agreement, which you can find at legal.hughesnet.com.
The Better Business Bureau is not a government agency. It is a rating agency (they actually give Hughesnet their highest rating, A+), and it can only act as an intermediary between you and the company. They can't do anything but contact the company. The company then has up to 30 days to reply to you. If you had posted here before contacting the agency, you would have received a reply much faster, but because you chose the slower route, it is possible that the company may not be able to respond to you here.
*I am not a Hughesnet employee or representative. This is a customer-to-customer tech support community, and I am a customer.
Since we signed with hughesnet I have never received a bill. They just take the liberty to take money out of my account. Cancelled service and instead of sending me a bill they took money out of an account that had very little money in it. So now I'm upside down with my account.