If your purchases aren't showing in your library, it's worth checking if you're logged into the correct account. There are several login options including email, Apple ID and Facebook so it's worth trying these to find the right account.
If you're sure that you've logged into the correct account, try pressing the 'Restore Purchases' button on the library page.
If you've bought a show on mobile but aren't seeing it on Oculus (or vice versa), you'll need to link your accounts. Check out the instructions here.