Hello bboss,
Welcome to the HughesNet community, we were able to locate your account and will be happy to assist you with managing your data. We can see that you have been a great customer since 2013 and I am wondering if anything has changed in your specific usage on your end? Do you have new devices or computers in your home? Is there an additional person using the system? We have had a thread created a while back that specifically addresses some of these concerns and things to look for. You may find this link helpful: https://community.myhughesnet.com/hughesnet/topics/data-usage-sources-common-and-not-so-common. You can also try isolating you modem buy following these steps in the graphic below.
Please let us know if this helps you.
Thank you,
Miles