Call History not showing calls, just get an error message.

Spent 2 hours on the phone with Xfinity today to ask why my Call History isn't showing calls.  We just moved service from a home to an assisted living facility in the same town.  Used Call History for a few years, but after the transfer of service the Call History shows...."There is a problem with your Xfinity Voice service. Please call 1-800-XFINITY for assistance."   I called that number but the people who answer can't help, they want to send a text showing how to log into Call History.  I can log in just fine, have been doing so for years.  I guess this movement of service really messed things up in their cubicle or home office.  Their technical support is abhorrent, the lady I spoke with first wasn't grasping the problem and wanted to send instructions.  Modem has been restarted a few times, still no luck.  I suspect whoever setup this account transfer neglected to enable Call History in their system.   It seems no one in Xfinity has a high enough level of authority who can log into my account to see why Call History has a problem.