premium channels

I cannot activate Peacock.  I have it as part of my streaming bundle.  Activation link says I have to get rid of the Premium subscription I have under a previous Xfinity deal.  No source can tell me how to do that.  Also, trying to activate using he Peacock app on my smart tv just results in subscription offer.  Ditto with Disney on my TV app.  What's weird is I can watch Peacock and Disney on my PC, but the TV app wants me to sign up.

Peacock site says: "We were unable to link Peacock to your Xfinity account. You may already have a Peacock subscription and first need to cancel, then allow your account to lapse before trying again." Xfinity tech says I can ignore that.  Evidently, my TV doesn't agree.