Not getting $10 discount for autopay and eco billing

This is now the 4th time I will be contacting customer service about this issue. 3 months ago I noticed that I was not getting the $10 discount for using autopay from my checking account and eco/paperless billing. I was assured 3 different times by Xfinity customer service agents, through the chat, that the issue would be resolved and I would be receiving the $10 discount on my bill. However my latest auto payment went through today and still no $10 discount or credit. I am now starting to believe that the $10 discount is nonexistent and I might as well start paying with one of my cards to earn cash back. Anyone at Xfinity want to fix this issue or at least tell me the truth that the discount will never be applied so I can move forward accordingly?