HBOMAX: No Access - "Cannot Verify Subscription"

I have had DirecTV with HBO for years so I am eligible for HBOMAX.  I had access to HBO Max for a few days, but then combined my bill to one ATT Bill.  Since that time I can no longer log onto HBOMAX - "Subscription Cannot Be Verified" comes up on each device.  I have spent 5+ hours on  the phone and no one can help (If someone tells me to delete the app and reinstall the app again, I will not be happy).  I can log into my DirecTV app with the same log in and that gives me HBO, but I cannot log into HBOMAX.