i was charge for something i didnt buy

How do you know you were charged $23.99? If it was in an email it was probably a scam. If you saw it on your banking website see this support article—>If you see apple.com/bill, itunes.com/bill, or an unfamiliar charge on your statement - Apple Support

Anyway, you can see what you were charged for by reviewing your purchase history—>See your purchase history for the App Store or iTunes Store - Apple Support

Note that if it was a real charge either you authorized the purchase or someone you share an Apple ID with bought it. Either way you are responsible. Unless your Apple ID was hacked; if you suspect that see—>If you think your Apple ID has been compromised - Apple Support

You can refer to this article provided by Apple on how you can get a refund: Request a refund for apps or content that you bought from Apple