Reactivating a Paid Subscription
If you turned off auto-renewal, but your subscription term hasn't expired, you'll see a "Reactivate" button in the navigation bar at the top of the screen.
Click on this button to reactivate your auto-renewal. You won't be charged right away. Reactivating auto-renewal means your subscription will renew instead of expiring at the end of your current subscription term. You'll be charged when the renewal actually occurs.
If your renewal date has already passed, then your subscription expired, and your account is now in free member mode. The Reactivate button won't appear, but you can reaccess the subscriber benefits by purchasing a new subscription.