Custom listing for buyer & someone else bought it

What would you do? I make & sell die cut vinyl decals. I uploaded a custom listing for a specific buyer but someone else bought it.. The listing picture was an image of the words Custom Listing which I created in Photoshop. The title was just CUSTOM LISTING FOR - ******** with the buyers id instead of the asterisks. The description was 'Custom order as discussed via ebay message' followed by 2 x stickers in red as discussed... The buyer the listing wasn't intended for wanted printed stickers which I don't make..