This is a user-to-user forum. You are not addressing Apple here. We here can guide you in the right direction, but can’t take actions on your behalf.
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See your subscriptions overview - Apple
If you want to cancel a subscription from Apple - Apple Support
Verify if the charge is for something else that is billed through Apple. The billing statement for your payment method doesn’t state the product or service, just the merchant. All charges to your account will be specified in the purchase history. View your purchase history for the App Store, iTunes Store, and other Apple media services - Apple Support
If you see 'apple.com/bill' on your billing statement - Apple Support
Apple also sends invoices by email for all charges. If you didn’t receive those, then consider if someone else has access to your payment method.
Else contact Apple staff directly to discuss what you saw in billing.