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I was charged for a subscription to the application by mistake, I did not use the application. can i get my money back?
iPhone 11 Pro
This is primarily a user-to-user support forum; other Apple users like you. Try the following: Request a refund for apps or content that you bought from Apple - Apple Support
Also, if you haven't already cancelled, see instructions in https://support.apple.com/en-us/HT202039