Unfortunately not, because a cancellation request applies to future renewals charges, not past charges. Subscription cancellation requests do not affect any current or past orders.
If you would like to cancel a specific order, please email our support team at firstname.lastname@example.org as soon as possible. We do our best to help our members out in this situation, but once an order is physically printed onto a packing slip for our fulfillment center to prepare, it becomes nearly impossible to stop the order from moving forward. It would be like finding a needle in a haystack (a single order slip in a stack of thousands).
You can cancel your subscription immediately by logging into your account here, clicking on Customer Service, and then Cancel Membership.