Though we'd love help out, we cannot returns funds that were given to another business! RedShelf provides the access, but we did not process your purchase. However, your school bookstore will be able to refund your purchase.
Bookstore purchases cannot be refunded if the usage or product's state conflicts with RedShelf return policy: http://redshelf.com/refunds. Please note that your school bookstore might have additional terms that could limit your refund eligibility -- always refer to their policy as well, before requesting a refund.
So sorry we can't help directly... routing people back and forth always makes us feel like this: