Hello, it seems you need help requesting a refund for a purchase and cancelling a subscription. Here are some steps that should help!
Request a refund for apps or content that you bought from Apple (How to request a refund)
- Sign in to reportaproblem.apple.com.
- Tap or click "I'd like to," then choose "Request a refund."
- Choose the reason why you want a refund, then choose Next.
- Choose the app, subscription, or other item, then choose Submit. If you were charged for a subscription that you no longer want, you can also cancel the subscription.
In your case, you can select the reason: A child/minor made purchase(s) without permission
If you want to cancel a subscription from Apple (How to cancel a subscription on your iPhone or iPad)
- Open the Settings app.
- Tap your name.
- Tap Subscriptions.
- Tap the subscription.
- Tap Cancel Subscription. You might need to scroll down to find the Cancel Subscription button. If there is no Cancel button or you see an expiration message in red text, the subscription is already canceled.
If you can't find the subscription you want to cancel, check this article out: If you can't find the subscription that you want to cancel
To prevent unapproved purchases made by a child/minor in the future, you can enable/try out one the following:
For more information on requesting a refund of cancelling a subscription, check out the following articles respectively:
I hope this helps,
Gabe