Payment

Look here, you can

• View your purchase history

• Request a refund

• Cancel a subscription

• Verify unfamiliar charges

https://support.apple.com/billing

Ccllilian Said:

"Payment: I haven’t requested to buy anything from the app, why suddenly have two records of purchase in App, how can cancel"

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Where do you see this?

A Phishing eMail?:

Is this an eMail? If so, it is a scam. So, forward it to Apple at: reportphishing@apple.com