Unethical bundle promises

When we signed up for hughesnet, we also signed up for directtv and were promised a discount on our bill from hughesnet. The promised discount should bring our bill to $67 according to our original agent we signed up with. Discount has not been applied to account, and I have called 5 times and emailed twice about it and was promised by a supervisor last month that she had it fixed, would take care of the first month bill and would apply it to our bill for our entire 24 month contract. Get our bill this month-no discount and twice the price. I called again and got another agent who says that there is no mention of honoring the bundled discount, no directtv discount whatsoever, and that to apologize for our bill being $30 more a month than it is supposed to be, she can apply a $10 credit for 3 months. Because that TOTALLY makes up for the $30 per month difference in the price we agreed on and signed up with.