Is this a scam?

Yes, it's a scam.

Let me guess, there's some gobbledegook web site they want you to visit, call some phone number, or both to stop the payment.

If there's a phone number, look it up in a Google search. I guarantee you it will have nothing to do with Apple.

That’s a classic scam.

⛔️ Block the scammer immediately! ⚠️

If you receive a suspicious email or SMS text message that looks like it's supposed to be from Apple, please email it to reportphishing@apple.com. 

Learn how to ⇢ Recognize and avoid phishing messages, phony support calls, and other scams.

Good luck! 👋🏼😉