That sounds like a total bullshit answer in addition to being unprofessional, as you're responding to him in public and calling him unsportsmanlike (a term I've never heard applied to gambling, by the way, but I'm not a gambler).
This term is used in bookmaker's rules, including 1xBit, and it means unfair character of a game or a bet.
That's total bullshit you can say that to a player on the pitch and not someone who placed his bet accordingly and won, what else is he supposed to do after placing his bet? Have you ever told someone who lost a bet that he had shown unsportsmanlike behaviour? We know that you are a Liar, and a thief but you trying to educate a reputable member only makes you look like a fool.
You can say someone is unsportsmanlike when he/she losses a bet and start crying and begging for a refund but not when he won, the only people showing unsportsmanlike is 1xbit because they refuse to accept the outcome of the game whenever they loses. I've been a gambler even before your scam site was clone from 1xbet.com.