TT180 is so right. It is typical WAS behaviour and you can never tell if it completely over. As hard as it is, you should only contact him if it relates to your boys.
Have you tried contacting the cable company yourself - explain that your H no longer lives at that address and if necessary give them his contact number. I did that when the bank kept calling about our credit card but wouldn't speak to me even though my name is second on the account. They soon dealt with the issue on my word.
You and your boys are the important ones now. Concentrate on you and them. Let your H sort himself out.
Both 50 S14 M 16 yrs (his 3rd; my 1st)
ILYBINILWY - 24 Dec 2012 H moved out - 27 Jun 2013 Legally separated - 6 Sep 2013 Closing the door and changing the locks