Doesn’t eBay always side with the buyer? Open a claim and get that refund!
I remember I sold a prototype for nes on eBay that wouldn’t go in a normal nes. Listed in the description the buyer would need a top loader with the top taken off to use(eprom stuck out to far) the buyer shoved in nes toaster and said it wouldn’t work... im positive they rented that prototype and dumped it. I had no chance hadda give all the money back