Kindly create a purchase "Dispute" on Facebook by the following steps:

•  Log into Facebook and click the small arrow (downward facing triangle) at the top right-hand corner of your Facebook page.
•  Select “Settings”.
•  Select “Payments” on the left-hand side.
•  Go to “Purchase History” and find the specific purchase record.
•  Once you've found the purchase that you wish to have refunded, click on the payment amount, and a popup message will come up.
•  Click on "Dispute this purchase" and you will be taken to a page to finalize your refund.
•  A confirmation email will be sent to you.