I sold two broken wheels. Listed as broken/for parts. Buyer emailed to say she wanted a refund so I replied asking what it was she wasn't happy about. She said they were broken and I'd listed them as spare parts so I directed her to the 'condition' section which stated broken/for parts. She then emailed to say 'ok' and that was it.
Two hours later she left neg FB and her comment was (N) 
I want to reply but not sure what to put. Obviously, I can't put what I'd really like to so I need some polite suggestions, please 
Or is it worth asking if eBay will remove it?
I know it's not the end of the world but it's still annoying...and I would have refunded her if she'd insisted but wanted to know what the actual problem was first.