Death of account holder

I'm trying close the account of my deceased father.  I've called and navigated your ineffective phone system and talked to a service representitive twice.  I've provided my contact informtion.  I've completed and submitted the Xfinity affidavit.  There is a still a bill with a start date that is after my first call.  Today I was told I'd need to call back again.

This is rediculous. I just want to return the equipment and move on.