I remember you have asked about it in their ANN thread one month ago. I'm quoting the reply of Betcoin.ag here
This is a known player, who has previously been banned from Betcoin on more than 1 occasion. We have confirmed that he continues to use banned scanner technology to find and place bets. We paid him his winnings in full on his first account, with the agreement that if he creates any additional accounts, they will be closed and funds seized. He has since created at least 2 additional Betcoin accounts. As stated to him, since the winnings he received in payouts from the first account exceed the amount deposited on the current account, this matter is considered closed. As always, any player who is able to follow the rules, will be paid extremely fast, as evidenced by our tens of thousands of happy players. Thank you
I have suggested you to create a scam accusation with proper proof at the time. You took one month to do it, but still you haven't provided any valid proof. However, it's clear that Betcoin.ag hasn't accepted your withdrawal request. They only said that you have multiple accounts and used one kind of technology to place bets. I think this case will be closed if they can provide the proof of your abuse with multiple accounts. I have sent a message to the user ‘Betcoin.AG’. Hopefully he will reply here soon.