Charges cannot just magically appear. You must have done something to cause them to appear even if you were unaware. Most common are downloading an App with a free trial and never cancelling it. Free trials normally renew into paid recurring subscriptions.
You can follow the steps here to verify your active subscriptions and cancel any you don't want or need: click here-> How to cancel a subscription from Apple - Apple Support
Then contact Apple Support directly to request a refund by clicking here-> contact Apple Support
If you want to talk to a person directly find a local number you can call here-> Contact Apple for support and service - Apple Support