You could start by saying: If you were temp banned by the server I believe it is only a few minutes wait. If you were banned by an administrator you should file a ban appeal by following the link below http://www.ecocitycraft.com/forum/forums/ban-appeals-complaints.14/
You are not banned by Staff, and so it must have been for spamming. You should be able to log on now. Also, I have moved this to our Help & Support forum.
Did you get a message that says "You are temporarily denied to join this server"? That's usually what happens when you're autokicked by the spam filter. Try joining now and see if it works.