How do we get a refund for a subscription?

If you got an email receipt, use the 'Report a Problem' link in it. Otherwise, click here and ask the iTunes Store staff for a refund.

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You can request a refund by following the instructions in the article linked to above. However, at least in the U.S., Apple considers all digital content sales final. They do give refunds on a case-by-case, exception basis. No one here would be able to tell you if you will get one.