Charged HBOMax but ATT plan included it free

I haven't paid close attention. ATT/DirectTV plan should, according to ATT internet package, include HBOMax. I originally signed up for TV/Internet through ATT, not DirectTv. However for the past few months I've been paying for HBOMax apparently on the TV/DirectTV Portion of my bill despite it should be free based off internet plan.

Requesting refund for those months or clarification on why I was paying for HBOMax when ATT plan said it was included. I have since cancelled the "HBO Max Addon" in the DirectTV website. Appreciate the clarification.