IF, IF, Hughesnet finally fixed the messages system, you will occasionaly get a popup, or a redirect when a payment is past due, and your credit/debit card information has expired.
The following things can cause a card to no longer be valid.
1: If an expiration date has been reached.
2: If the security code on the back of your card is no longer the same.
3: If your financial institution has blocked the charge.
I wouldn't click the links nor call that number, but would do the following to ensure my card information is accurate.
1: At the top of this website go to My Account
2: Click on Account Information on the pop-down
3: Under Payment Type at the bottom click on Update
This will allow you to re-enter your information, if these messages are from hughesnet, it may take 24 to 48 hours before the system stops generating those popups.