If you were booted you get a message that said you were removed from chat. If no message then it's probably a java fault that kicked you.
It's an old room and works so-so. Sometimes you can't get back in after such. Wait a day or so and see if its's cleared.
If you got the message it means a mod banned you for cause, and thats something I'd need to follow up on with staff.
Myriads