Good news, here's the reply -
"We have gone ahead and processed a 15% refund for your Boston Celtics Team Pass subscription. Please allow 3-5 business days for the refund to be returned to your account."
Not sure why I had to ask or what "returned to your account" means but at least I get something. I think the 15% is more than fair and maybe its a credit for next year, which I plan on getting again. I've done this for several years now (I live in Michigan) and its perfect for me. My only complaint is around 8pm EST the video starts to buffer from all the traffic. My internet speed is well over 300 so I know its not me, its the NBA's issue and I've complained about if for years.
I have Comcast but the year I got the League Pass thru Comcast I found out that all the games except 1 are in SD, not HD. So I use my computer monitor, sit in the den and don't bother the wife. Works good for me.