A seller offered free postage but when I checked out they tacked on $7. I immediately cancelled the order. Two days later the cancellation was rejected and the item posted.

There doesn't seem to be any way to actually seek help from eBay. It just keeps redirecting to contacting the seller. I've already done that. Why is there no way to simply open a case with eBay? I've never seen such poor customer service. Might be time to switch to Amazon and delete the eBay app after 20 years 😞