Apple services charge

If you received an email about an unfamiliar purchase, or subscription, it might be a phishing scam and nothing was actually charged to your account. Don't call, email or click on any links in that email. Just delete the email and you'll be fine.

To confirm if the purchase was really made, log into your Apple ID/iTunes account directly and check your billing or purchase history. If there really is an unauthorized purchase shown there, you can also file for a refund using the Report a Problem form.

https://reportaproblem.apple.com/

To avoid phishing scams, etc.

https://support.apple.com/en-us/HT204759

It’s also possible that this a fraudulent charge that just pretends to be from Apple. See this:

https://support.apple.com/en-us/HT201382

Normally, Apple would have sent you a detailed invoice email when/before billing your card. You can check your detailed purchase history by logging into your account.

See this article for details:

https://support.apple.com/en-us/HT204088