Being Charged for a phone I never received

I have been charge now multiple months for a phone that was stolen out of the box before I ever received it. I ALREADY GOT A NEW PHONE FROM XFINITY AND THOUGHT EVERYTHING WAS CLEARED UP. But for some reason they keep charging me for the phone that was stolen. I have called multiple times and spent tons of hours on the phone with them creating at least 10 tickets that never get resolved. Not usually some one to post but I just want people to be aware of the terrible customer service Xfinity provides. I have any been given credits on the account because they know they are in the wrong but still don't fix the issue.  I am now having to look into outside sources to get this issue fixed. Please do not waste your time with calling or chatting with there "support team"