Comcast cable & internet

My last name [Edited: "Personal Information"], my Nick name Diana i already sent death certificate and converter mini box it’s come from them since my husband death ,the bill keep coming so  i take over  Few month ago they still not closed my husband bill, the converter  box in my living room for cable on /off some week im not home my brother in law call them and they say no one paid the bill, so must be the ghosting us with 2 bill one with my new account my name already paid and second still in my husbands name if  easy to play button to turn off , because if someday keep give them his credit card which is my brother in law they will play button turn on. We are very disappointed  , they ghosting us.