Someone ruined my life through a contest

I had a contest running on my blog readers had to write a review about my blog after a month I announced a winner and 2 days after announcing a person owning a website nspeak.com made a blog and bought hosting on my server he posted same review which the winner wrote on his blog and set the whois of the domain a little like my blog's domain

He have a website on which I posted about my contest and after this all was done he was posting on every forum about me saying contest was hoax. He asked me on yahoo to give him $200 to stop all this. I said no just choose a winner and I will send him.

He isnt read to pick one and just posting on forum "Dont Link back to him, He is scammer"

NSpeaks.com and submityourcontest.com are scam websites they might ruin your life if you post your contest there.

Here is the proof of about asking $200 :
http://rishabhsood.net/here-goes-about-the-contests/#comments

(Second last comment)

What should I do now, He wont stop..

 

Did you pay the winner? before the other guy contacted you?

 

It was actually a iPod Nano or $200 contest..

I was going to send the iPod to the winner but all this started I asked SYC(Contest Blog) owner to pick a winner but he is himself asking $200 otherwise he will post on forums about me.. for the thing I havent really done.

He is even posting a reply in my threads on DP
Here is a link to his profile: http://forums.digitalpoint.com/member.php?find=lastposter&t=1023069

 

I am not the one who asked for $200. Hell I was not even in Delhi on 10 OCtober. I was in Amritsar. I have 6 Family people and my train tickets to prove this. Wanna see?

 

Your IP Matches with the comment!
I can show a screenshot

and now he is abusing me badly on Yahoo

 

Show me - I want to see it.

 

http://i36.tinypic.com/ru7frc.jpg

Here you go

 

Ok, guys...take it to IM or something.