@dcaver It looks like your account is upgraded directly through our website.
When you downgrade from Pandora Premium to Plus or ad-supported Pandora, you will not be able to access your on-demand music collection or custom playlists. However, your collection and playback history will be stored in our servers for when you return to Premium. In the meantime, you will have access to all the stations you've created and any podcasts you've added to your account including all Thumb feedback and added variety.
You can find instructions on how to cancel your subscription here: Manage subscription: Direct Billed
Hope this helps!
... View more