Horrible Ebayer

I never received my item #5165010270. I won it on 2-13-05 and haven't received it. I've tried e-mailing him 12 times with no response. So I left him a negative feedback. (which I had every right to according to Ebay policy.) To my suprise I received an email with the subject line "NEGATIVE FEEDBACK!!!!!!!!!!!!!!!!! !!!" threatening me to "mutually withdraw" my negative feedback.Yet again to my suprise, he left a very personal attacking negative feedback on my perfect feedback score. It is as follows: "THIS IS THE WORST BUYER ON EBAY! CANCEL ALL HER BIDS! SHE IS NOT SERIOUS! BAD!!!" Ebay will also not answer my many emails. Signed: Steve Kohler 7steelers7