lol, 66.6 GB free
Everybody loving hates BlockBot because it usually thinks people are pulling stuff like this; a lot of its /kickban triggers are horribly made. This is why I usually only use the IRC to PM people.
However, you can still PM people if you're banned (you're still connected to the CentralChat network and so are they), so you're not completely doomed.
/msg (whoever)
You might want to /whois them first just to make sure they're online.