Apple TV StreamSaver subscription activation problem.

I have been unable to activate Apple TV. At xfinity.com/yoursubscriptions when I go to activate Apple TV it gives me an error message saying "Something unexpected happened. Please close this pop up and try again. If the problem persists, try again later." I have tried for several days still getting this same message.

A prior email gave me a different website to activate, which initially said it was activated but only took me to the apple tv website to sign up for a free trial.

I am hoping for some kind of assistance to get this resolved.