This usually means you have no signal coming from the dish.
Are you sure your neighbors are on Sat and not UHF? Check the cables in your building. For some reason, there is no sat signal getting to the box..
How long have you had the DISH TV box before you noticed the channels disappearing?
Have you been affected by weather lately?
A satellite box won't work on a UHF aerial. You need built-in Freeview or a UHF box
You will need to get a decoder that works on UHF as the S7070 works on Satellite Only