Unable to access Primary account

We moved last summer from the Seattle are to Illinois where we had to get a new account.  Back when Xfinity made us reset all our passwords for our emails on the old accounts, around the end of 2023, I did that through the Primary User account.  I am trying to access that account/email now and it is forcing the password reset but when I try, it  requires the mobile number of which there is none tied to that account.  I tried putting in the old land line for that account as well as our current landline (both were/are through Xfinity) and get the message that I must work with the Primary Account Holder to them them change it.  "Them" is me, and I have checked all other accounts under that account to see if I had inadvertently changed which held the primary account status but none of them do from what I see.  All are just listed as "Manager" and do not show the other accounts on them under to be able to reset passwords and such.

I need to be able access that account to be able to get some important emails as well as simply have control over it.