Charges

See your purchase history in the App Store or iTunes Store - Apple Support says:

"If you can't find a purchase, or you see unexpected charges

• You might have been signed in with a different Apple ID when you made the purchase. Sign in with that Apple ID to check if your purchases were billed to that account. If you can't remember the password to that Apple ID, we can help. If you have two-factor authentication turned on, you might be prompted to enter a verification code.
• If you don't recognize a purchase on your statement, compare your purchase history to your statement before contacting Apple. Also check any other Apple IDs that you might have, including ones for family members.
• Learn what to do if you don't see an in-app purchase, but it's in your purchase history.
• If you don't see your purchase, it might be hidden. Learn how to hide apps for your iPhone, iPad, iPod touch, or Mac, and how to hide and unhide music, movies, TV shows, audiobooks, and books.
• You can see when your subscriptions were billed to you and at what price (with the exception of some subscriptions on reportaproblem.apple.com), but you can’t cancel from your purchase history. Learn how to view and cancel your subscriptions and other recurring charges or downgrade your iCloud storage.
• If you receive email notifications about your purchases, the email might not be from Apple or reflect actual charges to your account. Learn how to identify legitimate App Store or iTunes Store emails.
• If you still can’t find your purchase and you’ve tried all the steps above, contact Apple Support."