If you are looking to cancel an order go to the email with the purchase ID attached to it or within the email from Apple. You should be able to "Report" the purchase and therefore refund or cancel the purchase.
The issue and preferred resolution, in GetHuman-evapack's own words:
The problem I ran into: i want to cancel my order, i decided i didn’t want the jeans anymore. please help
I trust that American Eagle Outfitters will make this right and come up with a resolution that is fair.
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