Dispute Centre -> unpaid item dispute -> mutual cancellation
Before filing, inform the buyer that they will recieve a message from eBay that they have to agree to the mutual cancellation. If they do not agree you will not get a FVF refund.
If you have refunded the buyer they should have no problem agreeing but sometimes the message from eBay can be misunderstood so it's best to give the buyer a heads up first.
Ben

"What else could I do? I had no trade so I became a peddler" - Lazarus Greenberg 1915

"What else could I do? I had no trade so I became a peddler" - Lazarus Greenberg 1915
- answering Trolls is voluntary, my policy is not to participate.