Best of luck, Stargate. I hope that working together we can get to the bottom of this. Maybe the HN staff/mods on this site will have some input next week too.
Hang in there, and have a good weekend!
EDIT: Next time you need to make a payment, try this and see if it works for you:
1. Log out from the community
2. Go back to the community's home page: https://community.hughesnet.com/
3. DO NOT LOG IN. Click on PAY NOW
4. You'll be taken to this page:
5. Enter the required information and see if you can make a payment and it sticks.