Unauthorized charges on Apple account

Your first step is to try to identify the reason for, and source of, these charges. They may be perfectly valid charges you simply do not recognize.

The support article If you see 'apple.com/bill' on your billing statement - Apple Support explains how you can check your iTunes and App Stores purchase history, cancel subscriptions, and track possible sources of unrecognized Apple charges you may see on a bill. These may be purchases by Family Sharing members (you should see a receipt), others sharing your card (such as a spouse or a second Apple Account you have; you may not see a receipt). The article also provides a specific link for contacting Apple if you cannot trace the source of charges. If you use Apple Card you may find this document helpful too ➞ If you see an Apple Services charge you don't recognize on your Apple Card - Apple Support

Also note this service: View your App Store and iTunes Store purchases directly from your financial institution - Apple Support

"When you sign in to your financial institution website or mobile app and view your recent purchases from the App Store, iTunes Store, Apple Books, or for Apple Music or iCloud services, you may see an option—such as View Receipt—that allows you to view more details about your transaction."