To request a refund for your iOS subscription, follow these steps:
On the Apple sign-in page, sign in with the Apple ID you used to purchase your subscription
Tap I’d like to > Request a refund
Select the reason for the refund request > Next
Select the purchased item > Submit
You’ll be updated by Apple within 48 hours. Unfortunately, we don’t manage your Apple subscriptions and payments, so we can’t issue refunds directly.
For further information on Apple refunds, refer to Apple Support at the bottom of the linked page.