I would suggest that you post a case number from one of your support calls or the serial number of your modem (can be found on a sticker on rear/bottom of mode) so that the Hughes Mods can locate your account when they return to work on Monday.
Please do not post your SAN (starts with DSS) or email address.
In the meantime I suggest that you create an account at http://testmy.net/ and run a series of manual 12 MB tests.
Please do the tests with a single computer directly connected to the Hughes Modem so as to eliminate as many variables as possible.
Post a link to your saved data or screenshots of the results for the Mods to review.
All of the above will allow the Mods to run remote diagnostics on your system.
Hopefully your speed tests were done using Hughesnet's own test or through an account you opened at testmy.net. These are the two tests that the reps accept as accurate, and both keep a record of the tests run. The official reps will be able to see the record of the tests and make a determination on what to do. As Gwalk900 stated, they will be back on tomorrow (Monday).