Apple Music
There is months were i get charged twice and i don’t know why i only have Apple Music and i shouldn’t be getting charged more then $12
iPhone 7
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Everything that gets billed to your Apple ID, will be mentioned in your purchase history. Please try to find a match there, for the indicated date and amount. See your purchase history in the App Store or iTunes Store - Apple Support
Additional resources:
If you see 'itunes.com/bill' or an unfamiliar charge on your statement - Apple Support
About payment card authorization holds from the App Store or iTunes Store - Apple Support