Re: "Unauthorized iTunes charges" : " ... I suspect fraud ...".
As you are suspicious, you may need to keep aware of further attempts: Eg: See how to: Recognize and avoid social engineering schemes including phishing messages, phony support calls, and other scams - Apple Support
You could check what settings you have in place to avoid unauthorized purchases.
Eg: Check in your settings whether or not purchases require your authorization.
Manage App Store purchases, settings, and restrictions on iPhone - Apple Support
Also:
If you think your Apple Account has been compromised - Apple Support :Eg: Immediately change your password.
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Re: Has anyone else faced a similar situation? How did you resolve it?
As Apple users, like yourself, we have no access to feedback etc. sent to Apple, so there may or may not be others who reply to you here sharing their own experience.
Keeping our devices up-to-date with the latest OS versions can help avoid issues.
Apple support provides articles, and Apple regularly releases security updates for our devices.
Eg: Get help with security issues - Apple Support
Also:
About purchases not billed through the App Store or the App Store’s In-App Purchase system - Apple Support
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Else if fraud is not involved:
We do not know what kind of transaction(s) / payment(s) took place
As Apple users, like yourself, we do not have access to your accounts, details, or who received your money'.. We have very little info. to go on. (Eg: You may need to check whether a family member made purchases.) You may want to see if your situation is covered below.
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Eg: For Apple Pay for purchases from merchants or online stores etc.
Get a refund for purchases made with credit or debit cards using Apple Pay - Apple Support
How to: See your Apple Pay transaction history
See your Apple Pay transaction history - Apple Support
NB: in above article:
Dispute a credit or debit card charge made using Apple Pay
“If you need to dispute a charge made using Apple Pay, contact your bank or card issuer”.
If needed:
Apple Pay Support:
Get support with Apple Pay:
Apple Pay - Official Apple Support
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As payment appeared to be made for iTunes purchases from Apple,
See what the charges were for: Check if they appear in your payment history.
View your purchase history for the App Store and other Apple media services - Apple Support
or
How to see what you (or family) were charged for,
If you see 'apple.com/bill' on your billing statement - Apple Support
if money has been deducted (not pending)
You can request a refund and wait to see what Apple decides.
If your request is approved, the money is returned to the payment method that was used to purchase.
Request a refund for apps or content that you bought from Apple - Apple Support
If a subscription has been purchased in error, it will need to be cancelled so that further charges are not made:
What to do: If you want to cancel a subscription from Apple - Apple Support
Eg: For in-app purchases etc:
If the payment was made to an app developer:
How to contact an app developer - Apple Support
or
The best source of help for a product not made by Apple (a third-party product) is the company or person who made it—its vendor or developer:
How to: Contact a third-party vendor
Contact a third-party vendor - Apple Support
To report a concern about an app, you must provide the URL of the app.
Find the URL for an app in the App Store to report a concern - Apple Support
To report a problem: https://reportaproblem.apple.com/?s=6
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If needed:
Billing and Subscriptions Support have a "Get Support" link (online chat / phone / email etc.) at the bottom of their webpage (link below): Subscriptions and Billing - Official Apple Support
Apple phone numbers around the world:
Contact Apple Support - Apple Support
Eg: says:
Việt Nam
1800 1127
All the best :-)
