Movies disappeared from my purchases

I got some movies from the rewards program when I was a regular xfinity customer. Now that I transfer from regular xfinity services to "xfinity now" customer, all those movies are gone from the stream app under my purchases. I thought those movies were mine to watch forever. I contacted support via chat and they told I won't be able to stream those movies until after I swith back to regular cable service. That does not sound fare. I got these movies to watch forever not only when I got regular services with you