xfinity has linked our account information to an old, inactive address and not our current service address

I've been through phone customer service and in-person (store) customer service. I have (i think) an accurate account number, and accurate (i think) xfinity ID, and email and phone and when i try to see bills paid and past charges i am directed to an old account, with a different number. I tried to link the accounts and got caught in a password reset loop one time, and other "log on to your home wifi" loop another time. I'm at home, on my home wifi, provided by Xfinity. Anyone have this backend problem? Thank you.