How do I dispute unauthorized credit card charges?

Contact the bank the issued the card to dispute any fraudulent charges.

If you have a subscription on your Apple Account, you can view and cancel that here:

View or cancel app subscriptions on iPhone - Apple Support

In addition, the purchase history can be seen here:

View your purchase history for the App Store and other Apple media services - Apple Support

Hello~ In addition to *Mac Jim ID’s* excellent information click on below and review this user tip by *MrHoffman* as it explains several possibilities very well.

Billed, but you didn’t buy? - Apple Community

Where are you seeing these charges? If in your banking or credit card only then I would recommend that you contact them as soon as possible as this may indicate that your banking/credit card information may be compromised and being used by an unauthorized person.

~Katana-San~