Would really appreciate if you would use milder language - CP and child abuse is a dreadful topic.
But also, we have stopped your account merely for a check, there was no need to delete, please contact our support for clarification and so we could send you transaction.
Send the money you owed him so it will not look like you are scamming him, if you have solid evidence of the allegation which is a very serious one, then have a conversation between the two of you to avoid leaking email or personal information, he seems to deny your allegations and I don't know if he will dare you to come out with a piece of evidence but if he dare you then you are free to do it.
Actually Duckdice.io is only site where you get accused with anything.they accused me with a user before here.the user was having a post here against them.later they paid him 100usd.so thats their policy maybe to accuse any person with anything.as you can see on this post bellow.