Okay, calm down now, bro.
Are you new to this game and community? It's against the rules for people to swear in the chats. It's very frowned upon, in fact. What you should have done is taken screenshots of this person who was swearing. You should have gotten a screenshot of them, their username, and the things they said in the chat and sent those screenshots to a moderator for them to handle. Do you perhaps have any screenshots of the incident? If you do you can send them in a report to a moderator for them to deal with this foul-mouth you speak of.