Cannot access Power BI account

Hi all:

First-time post:   I am an individual user with a Power BI Pro subscription.  I cannot access my account.  It requires an email, which is apparently invalid for me.   I have a  domain name and a user name.  But you can't enter those.  Further, the subscription does not show on my 365 / Microsoft account.  I have tried several paths and phone calls, but I am frustratingly stuck.  Can anyone help with the correct contact number or location or some sort of solution for me?