Processing refunds for sponsorships is a two-step process.
Step 1: Refunding the Money
Log into your payment gateway (WePay, Authorize.net, etc..).
Find the transaction that you wish to refund and follow the directions within your gateway to issue the refund.
Step 2: Delete the Sponsorship Amount from Wizathon in order to Update your Management Data
Log into your Wizathon account.
Go to the "Sponsors" tab and find the sponsor transaction that you wish to delete.
Click on "delete", the third action button, (X icon) to the right of the transaction to proceed..