Payment

Check your purchase history and your subscriptions:

See your purchase history in the App Store or iTunes Store - Apple Support

and

View, change, or cancel your subscriptions - Apple Support

If you don't see anything, check also your bank statement. If nothing appears on that documents, it's a scam.

DO NOT give any personal info to anyone.

If you find out your purchases or subsciptions, for any further doubt, contact iTunes Store Support and explain your problem, filling out and submitting this form: iTunes Store – Contact Us – Apple Support

Regards

Giulio

Probably it's a scam.

See this: Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams - Apple Support

As already suggested, for futher questions contact iTunes Store Support team.

Regards

Giulio