Rented movie not available on Xfinity stream

I have rented a movie and wanted to finish watching it on either my phone or laptop so that other family members may use the TV.

Regardless to device, the movie was showing as ‘purchased’ under the ‘For You’ section but was not available till watch. On the web app, I had a ‘buy’ option.

I was at home using my Comcast internet.

Why is this not working? Can I get reimbursed?

Thank you