Coinplay team is promoting their casino in bitcointalk forum. Therefore, you should have the ability to provide an update about the issues here. The situation would be worse if you don't provide any official response about the accusations.
Casino hired someone to represent themselves in bitcointalk. There are a few casinos that operate by themselves as well. Since they hire someone, it sometimes becomes quite hard to share such confidential info with their representative. I guess that's the reason why OP can't help here. nevertheless, I guess coinplay must consider this and allow the OP to share account-related info to solve some issues created from bitcoinbtalk; otherwise, it won't take long to destroy their reputation for no reason.