Free HBO Max because I’m an AT&T customer?

I’m just trying to find out if I have a free HBO Max subscription as a result of having an AT&T Unlimited plan. I’ve tried calling multiple times. First attempt, you could hear the customer service (CS) agent joking and laughing with the others in the background (and they sounded like they were sick, uninterested, or inebriated). Second attempt, they transferred me from the  phone department to CS, CS straight up hung up on me after over 20 minutes of waiting. Third attempt, they just said “oh, you need to call directTV, we have no idea” without even listening to my question all the way through. Tried the online chat support, the bot wouldn’t let me talk to a real person. 

ALL I WANT TO KNOW is can I “redeem” a free HBO Max subscription because of the fact that I’m an AT&T customer with an Unlimited plan. Like how T-Mobile customers get free subscriptions to services because they’re T-Mobile customers. If so, HOW do I “redeem” my free subscription. If not, did it USE TO be the case? I see online posts about people being grandfathered in and stuff but you can only trust Twitter and Reddit so much.