PRIVACY ISSUE: No one can help me remove my ex's contact information from my Mobile account and he is receiving billing notifications

Neither the Mobile team nor the CSA team after a month and 8 phone calls can tell me when my contact information will be trusted or verified by the system or WHO AT XFINITY can replace my ex-boyfriend's contact information on my mobile account with my information (website>Settings page).  I need to have him port his phone number to a new account but am unwilling to do this until his information is off my account and replaced with mine.  Can someone at Xfinity PLEASE HELP ME!