Again, as the original replies to the topic stated you can dm a mod if you feel you were unfairly muted.
However if someone is circumventing the filter take screenshots of the chats and email them to abusereport@chess.com (I believe that's it) along with a report here on the website.
Mods can't do anything about live chat mutes. Those just have to expire and unless someone gets hit by it a lot, it's normally only 30 minutes.
If chess.com bought that filter for money from another company, it would be a good idea to demand your money back. If the filter is the work of chess.com developers, maybe you should radically improve it before you put it back to work. Either way, the way it works now is just a bad joke.