Is this a one-time payment or automatic renewal?
All subscriptions are automatically renewed to ensure your continuous access. Once the automatic renewal has been cancelled by canceling the payment in iTunes, your subscription will be canceled for the next due payment.
How can I cancel my subscription?
Open settings app. Tap your name. Tap Subscriptions. (If you don't see "Subscriptions," tap "iTunes & App Store" instead. Then tap your Apple ID, tap View Apple ID, sign in, scroll down to Subscriptions, and tap Subscriptions.) Tap the subscription that you want to manage. Tap Cancel Subscription. If you don’t see Cancel Subscription, the subscription is already canceled and won't renew.
Can I have my money back if I change my mind?
Payments via iTunes can only be approved and refunded by Apple. To receive a refund from Apple, you must contact iTunes Support within 14 days of the purchase date.