I don't want to discourage the court route if you felt strongly about it, but libel or slander (spoken or written), is damn near impossible to prove. At the least you would need multiple people loyal to the branch to all flip and once and corroborate your story showing intend to defame.
JW's are a religion. So the first amendment is both a sword and a shield. And for Satan running it apparently, they sure do avail themselves of everything possible to protect themselves.
So I wouldn't put too much on that. Try to handle it free from legal challenge. It might just be the anger and frustration talking.