My apologies for the responses you've received here. This is,
unfortunately, a marginally useful forum for seeking assistance, as we
have some members who haven't yet grown up.
Good question, though. Sad to say, eBay does not care. It is unlikely
they will even read your communications with them. They do have a
number of reasons detailed in their agreement for removing feedback,
and your case isn't even close.
Buyers being able to hurt sellers with poor feedback is a fact of life
on eBay, and something you have to accept with a grain of salt. IMHO,
you will be fine in the long run; don't let one jerk have any control
over your life (and I include some of our posters!).
You won't get it changed. eBay does not care, and fairness is
certainly not on their list of corporate objectives. Automated
transactions and answers to your inquiries are their norm.
In the end, most everything is far more important than feedback on an
impersonal online selling site. Don't let your life be defined by
something as trivial as this. Thanks for coming to ask, and again
apologies for, and you should ignore, our resident dummy.