@Alyssaholt I'm showing your Pandora account is already on the Premium Family plan, so no further action is needed for you to join.
If you aren't receiving the benefits of Pandora Premium on your phone, I recommend signing out of the app, and then signing back in to your upgraded account.
Let me know how it goes.
@Alyssaholt I have created a ticket with our support team for you.
They will be contacting you privately via email to help look into this further, so please keep an eye out for their message.
Thanks for your patience in the meantime!