Update. Immediately after I posted this I figured out how to cancel. Phew!
Help!
I got a winning bid of 8 bucks for a pony on eBay. The person didn't pay. I waited a few days and sent the invoice again. When I went to see how to report the buyer I somehow clicked "mark as paid" or whatever it says. Now eBay wants me to print a shipping label. I can't figure out how to cancel. I got two messages from the person saying they didn't bid and want me to explain what is going on (eyeroll).
How can I cancel this so I can get rid of the "buyer" and relist the pony?