JHBGirl, sounds like a problem I had 2 weeks ago sunday morning, I also have a dish, and completely lost the tower, called support, they also said there is nothing wrong, fiddled on the roof for many hours trying to get a signal again, with no luck.
Then went driving around the tower with the modem, and realised the node I usually connect from my house was dead, after 15 minutes of convincing the ORC that the problem is not on my side, he agreed to log a ticket, 3 hours later, everything was oprational, I called back to ask what the problem was, and he responded that they needed to RECYCLE the cell.
call your friendly neighberhood ORC, and persist that its on his side, maybe suggest they recycle the node your trying to connect to, it requires you telling him the frequency you usually connect at, and tower number, and his 2nd level can do it from the comfort of his chair!