If your buyer hasn't paid for their order in more than 3 days, you can cancel that order. This means your sold products would return back to their previous state with same product quantity, as they were before the sale.
To cancel an order, go to My Sales page under My Account (requires login). Then click on the order number within the table in the middle of the page.
On the next page, scroll down to the bottom of the page and click on "Cancel Order" button. That's all you need to do.
Last Updated: Dec 2, 2013