If you bought cable boxes, then nobody likely came to your house to disconnect any cables. Those boxes are programmed to work at the cable office. Try plugging one of the boxes into the line where you currently have service. If it still doesn't work, then it's not the cable - your box has been deactivated.
Personally I would switch companies if they are doing this. The cable companies make so much profit as it is. I can't believe they would make an issue out of something that they only suspect. What happened to the customer is always right?
It's time to switch. The dish isn't that big. Some people install them on their sheds in the back yard.