Requesting refund

I would expect it to take a week. On this Support Article, there is also a link to check the status.

Request a refund for apps or content that you bought from Apple - Apple Support

Yep! Once the refund has been accepted it may take a couple of days to show up on the payment method that you use. Credit/Debit cards typically take a 2-3 days to process the request once it has been received. If you used your store balance for the purchase, then those typically get credited sooner. Apple Card is about the same time as any other credit card.

The good news is that you were able to see that your refund request was granted. Refunds are not guaranteed and it was probably due to the swift action on your part to request the refund shortly after you realized the mistake that was made.

The time for a refund to be posted to your account depends on the payment type used for the initial purchase. Thsoe times are shown in a "check the status..." link on the page Mac Jim ID posted.

Yes.

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