I don't think you're supposed to do topics like this.
Ban this person moderators

There is a mechanism on reporting members and that is what should be used. You still can't make public accusations there but can have discussions around it.

You should use the report option, not post in the forums.
https://support.chess.com/article/209-how-do-i-report-someone
[If you would like to report a player for obstructing the community guidelines, please use the report button located on the players profile. Thanks!; KL]