This is a user to user support site. The people responding on this support forum are users like you. We have no special access to Apple or your account information. All we can do is guide you to the information Apple provides to all of us. In this support article —> https://support.apple.com/118223 Apple usually says, “Some purchases from the App Store, iTunes Store, Apple Books, or other Apple services might be eligible for a refund.” It says “might” but that also implies some might not be eligible. Apple does not detail its criteria for refusing refunds. Refund terms vary greatly according to country so I strongly suggest that you check them for where you live by clicking on this link https://www.apple.com/legal/internet-services/itunes/ then choose your country and language if you are not automatically taken to the correct page version. Refunds are outlined at the end of section B. In some countries it says that all purchases are final. Refunds are an exception.
After an initial refusal it appears that you can make one appeal and need to make that your best job. Once you have been denied twice, or it says the decision is final, then in my opinion it is probably pointless contacting Apple anymore.
Apple’s position appears to be that people need to be proactive about purchases, canceling subscriptions at least 24 hours before trials end or a subscription renews, and ensuring that others are not able to make unsanctioned purchases on a user’s account. Note that if you allow—intentionally or not—another person access to purchasing on a device, or through Family Sharing if you are the Organizer, you are taking responsibility for things they do. Apple offers these features to help you avoid this situation:
On your device you can use Screen Time to prevent unintentional or unauthorized purchases from the App Store, in-app, and other Apple services. —> https://support.apple.com/102470
Also on your device, require a password for App Store and iTunes purchases —> https://support.apple.com/119848
Use Screen Time as part of parental controls on your child's iPhone, iPad, and iPod touch —> https://support.apple.com/105121
Use Screen Time to turn off in-app purchases on your iPhone or iPad —> https://support.apple.com/102470
If a child made this purchase on their device as part of Family Sharing, consider activating Ask To Buy—> https://support.apple.com/105055
Use Guided Access to permit a person to only use a single app —>
https://support.apple.com/guide/iphone/use-guided-access-iph7fad0d10/ios
