So, first off I'm an idiot with fat fingers. I tried to give a buyer a partial refund as there was a small hole in something I'd sold and not realised, they opened a return case but we're happy with a partial refund. But rather than do this, I've refunded the whole lot which had now closed the case automatically. Is there any hope of getting my money back? Or do I chalk it down to experience. It wasn't a huge amount but I could kick myself.