I didn't authorise this purchase

See the following instructions. They include information on contacting Apple Support if the other steps don't help: If you see "apple.com/bill" or an unfamiliar charge on your statement - Apple Support

If the only indication of the charges is from an email or text, be aware that it may be a phishing attempt to get you to log in to a site that appears to be Apple and divulge your password or credit card information. See: Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

and Identify legitimate emails from the App Store or iTunes Store - Apple Support

Bysenaa Said:

"I didn't authorise this purchase: How i can take my money back cause i didn't buy this aplication. Please help me"

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Where did you Get Word on this?

Did you receive an eMail on this? If so, view your purchased Applications. Is this application seen in it? If it is not seen, it is likely a scam.

Did you click on anything on the eMail? If so, consider modifying your credentials:

• Modifying: your login credentials (Using Both a New eMail and a New Password for each and all sites)
• Associating: a different method of payment to your account
• Enabling: Two-Factor Authentication for Apple ID and for all other accounts that have such an applicable option