No Autopay and paperless billing discount

I recent moved and decided to try xfinity as my previous internet provider was not an option anymore. When I signed up, I was told I would get a $10 discount per month if I used autopay through a checking account, which I set up the day I signed up. It has now been 2 pay periods without the discount applied. I cannot seem to chat with a person and the Xfinity Assistant does not understand my question or connect me to a live chat.