Xfinity Inter Billing Issue

Hello,

I have been trying to disconnect Xfinity Internet service from my old house due to moving/transferring services to my new house. The thing is I am still getting billed for my old service address after two billing cycles of no service. I really need help getting to the bottom of this please. Off shore customer service is pretty basic and don't really understand what customers are trying to relay in our concerns, tones, mannerisms. And they just tell you everything will be taken care of after a few days. Well I am here and still getting billed after the fact internet service is supposed to get disconnected from my old place.