Unauthorised itunes payment
I got charged twice for purchase on itunes which im not aware of
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. 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.