Big 10 Network blackout of UCLA, USC, Oregon and Washington games

Why are the games of UCLA, USC, Oregon, and Washington blacked out on the BIG 10 Network.? We always enjoyed their games on the former PAC 12 Network and now you're refusing to shop them on the BIG 10 Network. I called that reduced programming at an ever increasing cost!! By definition poor customer service!! as a Xfinity Diamond account w want this fixed now! [Edit: PII]