I completely empathise. I’ve been selling on eBay for 15 years. It used to be a great and fair place to trade, but they’ve changed it to weight so heavily in the buyer’s favour that now it’s full of chancers and liars who will try anything to get money back or off.
I completely understand how frustrated you must feel.
Almost every sale I grit my teeth for several days waiting for someone to email me saying x or y isn’t to their liking and they want money back.
A pillow I sold for £5 (which was worth over £50) the woman messaged me to say she found a hair on it... with a picture of a dog hair. I don’t have a dog. But she wanted the postage refunded and then she’d be happy.
Another woman claimed a pair of kids shoes which she got for £7 (worth £35) hadn’t arrived. She wanted a full refund and left awful feedback before I even got a chance to reply to her first email.
I decided not to let this one go (mainly because of the feedback) and phoned Royal Mail with the receipt from the postage. They opened an investigation and confirmed in writing that someone at that address had received the parcel.
She still denied she’d Received it so I went to a Ebay help with the Royal Mail letter and her abusive emails.
In the end Ebay refunded me and deleted her negative feedback.
BUT... she still had the shoes, didn’t she.
Full of scammers.
Gumtree, Depop, FB Marketplace, all preferable now. Lot less hassle, quicker sales and less complaints.