Why are my boxes cutting out or receiver rebooting on its own?

For two weeks, either the Contour receiver reboots or one of the Contour boxes cuts out w/a msg "Sorry, there seems to be a problem". I swapped out one of the boxes in my bedroom today to see if that helped, but the receiver in the living room rebooted itself again later in the evening so it wasn't the box I replaced. What I found odd is when I went to the store to replace the box, the CS employee asked if any of the other boxes are having issues. I said the receiver and a mini box were replaced not long ago, I have one other box that could be having issues, but I want to see if it's this one first. Then he says if I replace any other boxes and the problem continues, a tech might have to come out to see if there's something going on in the house. Two wks ago, my elderly mom somehow accidentally ordered a Hallmark+ show w/the remote. I wasn't home and I got an email for the charge. She's 90 w/early Alzheimer's and only knows how to turn the tv on/off & enter the channel #''s for her favorite shows. I contacted CS to have the charge reversed immediately. They said they put a block on our svc so nothing can be ordered accidentally again. I have a feeling that's causing the issue b/c the boxes weren't doing this before the block was put on.