Couple of things. If you just unlocked the app, and content still shows locked, first, please confirm the transaction went through successfully by checking your purchase history:
For iOS purchase history click here
For Android purchase history click here
If you can confirm the purchase or the content is just stuck or locked, then, please try going to CONTENT and pull to refresh. This will re-load the metadata and often fixes such issues.
Be sure to force close and reopen the app.
How to force close on iOS: http://apple.co/2i1YBd2
How to force close on Android: http://bit.ly/2hsABAL
If that doesn't work, please try to delete the app entirely and re-download it. Once you've done this, you'll need to re-unlock any purchases you made. Simply go to SETTINGS > RESTORE PURCHASES.
Please let us know if any/all of these do not work.