Aye mate, what you're doing right now is a tad silly.
They're just messing with you, well, in a way that causes you mad of course.
But thing is you could've just ignored the fact if you really think that it's not true. All you do is keep on going, ignore that chat, and do whatever you were doing, better yet, leave the server if it becomes such a problem, but all they're trying to do is make you mad.
I'm not taking any sides here, but this could've been easily dodged and no need for all the troubles.
Either way, good luck with it.