To restore your subscription, open the Profile tab → Click the Purchase icon at the top of the screen → Restore.

If the subscription has not been restored, make sure the subscription is active:

• Open the Settings app → Tap your name → Subscriptions. (If you don't see "Subscriptions," tap "iTunes & App Store" instead. 
• Then tap your Apple ID → View Apple ID → sign in → Scroll down to Subscriptions, and tap Subscriptions.) → Select a subscription to manage.

If you tried to see or cancel a subscription and can't find the subscription you're looking for, contact Apple Support.