Make sure you're trying to cancel the label that wasn't used, and not the one that was used.
To void a shipping label purchased through eBay, go to this page, find the order and select Cancel from the Actions drop-down. The cancel option is available for 28 days.
It takes between 2-4 weeks to receive a refund on an unused, voided label as the carrier wants to make sure the label isn't used. You'll see the refund on your original source of payment (eBay funds, bank, credit card, etc) and the funds will appear in your account without an email notification.
