Why am I receiving a bill after I cancelled my service?

Good Morning, @user_10jbc8! Thank you so much for taking the time to reach out to us here on the Xfinity Forums! I am very sorry to hear about the experience with your Xfinity Mobile account still being billed after cancelling the services, it certainly is not what we want for our customers. I would be more than happy to look into the details, and ensure everything is closed up with your account. Can you please send us a DM to get started?

Please send us a direct chat message with your full name and complete service address to “Xfinity Support”. To do so, click on the chat icon located at the top right of this forum's page.

Here are the detailed steps to direct message us:

1. Click "Sign In" if necessary. 
2. Click the "Direct Messaging" icon. 
3. Click the "Start new conversation" (pencil and paper) icon. 
4. In the "To:" line, type "Xfinity Support". 
5. As you type, a drop-down list will appear. Select "Xfinity Support" from that list. 
6. An "Xfinity Support" graphic will replace the "To:" line. 
7. Type your message in the text area near the bottom of the window. 
8. Press Enter to send it.

https://forums.xfinity.com/conversations/guidelines/how-to-direct-messaging-within-the-forum/697ba1e570934d009185c514