Q: Purchases from my cc without my permission

Look at your accounts purchase histories (including family members if you are a family sharing organiser) : See your purchase history in the iTunes Store on a Mac or PC - Apple Support

Or did you add/change payment or address details on an account : About payment card authorization holds in the iTunes Store - Apple Support ?

If purchases show, and you didn't do them and nobody has access to your accounts / devices / computers, change the account's password and contact iTunes Support ('contact us' at the bottom right of every page on here)

If that card isn't on any of your accounts then contact the card issuer, iTunes Support will only potentially help with purchases done on your accounts.