Why am I being charged more than once a month for iTunes
I’m being charged multiple times for something
iPhone 8 Plus, iOS 12
If you see ‘itunes.com/bill‘ or an unfamiliar charge on your bank, credit card, or debit statement - Does not mention purchases made under Family Sharing which might be charged to the organizer's card but will not appear under the organizer's purchase history or subscriptions. Ask family members about those or check your receipts.
https://support.apple.com/HT201382
Request a refund for an App Store or iTunes Store purchase - "You can't request refunds for recurring charges" https://support.apple.com/HT204084
Report A Problem to "Sign In for help with iTunes purchases made in the last 90 days" or ask for a refund -->
http://reportaproblem.apple.com
Subscriptions aren't managed through Report A Problem , see: View, change, or cancel your subscriptions
If you have unsatisfactory results with Report A Problem or still want to try to request a refund for a subscription, contact:
iTunes [Store] Support - Use this form for assistance with account and billing, code redemption, or purchase questions - https://www.apple.com/emea/support/itunes/contact.html
Worldwide iTunes support - https://support.apple.com/country-selector/itunes