Can't access free HBO under my plan

Same problem as everyone.  I can't get to the HBO tile in my AT & T account.  If I attempt to log in using the HBO max it takes me to a Directv log in page.  Had Directv over 3 years ago and stopped it.  I see no linked accounts.  I had HBO max via a paid subscription and cancelled it in January so I can get the free HBO Max that is included in my account.  I even received a mailing to my house that noted I had free HBO max now.  Nothing works.  I've changed my user ID and my password.  Still nothing.  Beyond frustrated.  Been trying for a week.