Apple does give refunds for mistaken purchases — here's how to get oneHow you get a refund for iTunes or App Store purchases and in-app purchases isn't obvious, but it is possible!
If you experience a problem with music, movies, TV shows, books, or apps you purchase from iTunes or the App Store, you can request a refund directly from Apple. You'll need to have a valid reason for the request—it's not meant to be a way to get free trials or short-term use— but if you buy something by accident, buy the wrong thing, or get the wrong thing, or don't get anything, it's how you get your money back.
Note: You can only report problems on items you purchased within the last 90 days.
What happens when you report a problem
How to get a refund using your iPhone or iPad
How to get a refund using apple.com on the web
How to get a refund using iTunes on Mac or Windows
What happens when you report a problem
When you report a problem with an app, you're given up to six options to choose (depending on the app or in-app purchase). The option you choose for repo...
Source:
Apple does give refunds for mistaken purchases — here's how to get one