Dang it, where's chessmates when you need him, this is right up his alley.
What software are you using?
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Just be proud and ignore them. 
If he can not stand loosing he should try fishing or something...
Here is the full conversation:
rony1990: Your brain is like a software !
RCTurner: lol - is that good or bad?
rony1990: At the beginning of this game your moves were like as 440 volt electric. But now it is like as rotten potato.
RCTurner: Your engrish is very good!
rony1990: I'm Ph.D in English.
rony1990: And Noble Prize winner in chess.
RCTurner: Gold medal in self-delusion more like.
rony1990: Which software you are using?
RCTurner: Ha ha - take it like a man. You lost 2-0. Have a look at some of the games I have lost if you think I cheating lol.
rony1990: I analyzed your game. Your moves were similar to Fritz. You are not so strong as Fritz. And don't think me I am a 4-year old kid.
RCTurner: Complain to chess.com then. You are just bitter because you lost.
rony1990: If complain they will ban you. And you will reopen a new account. Nothing useful.
RCTurner: Or they might say - stop wasting our time you idiot?
rony1990: See this link : http://www.chess.com/forum/view/community/chesscom---list-of-caught-cheaters?page=2
rony1990: everybody says i'm not cheater. but chess.com banned them.
RCTurner: So why don't you complain to the admins then? Because they will laugh in your face.
"So why don't you complain to the admins then?"
Asked my opponent after I had just beaten him 2-0 in a tournament. He is graded about 50 points ahead of me. Should I be proud or outraged? Or just put him down as bitter?