Tap the Subscriptions row to view your current subscription list.
Any of your currently connected subscriptions will be displayed in a list directly underneath the words My Subscriptions:
If you don’t see your purchased subscriptions here, visit the Settings > User Settings > Username page and ensure you’re signed in correctly. Once you’re signed in correctly, return to the Subscriptions page and tap the refresh button 
in the top-right corner of the screen.
You can directly purchase subscriptions from within the subscriptions page if you choose. This procedure utilizes your Apple account for the transaction, and thus attracts an Apple royalty.
Need more help with this?
Help Centre (Tap and hold to open the Link)