When you try and connect to the server you are banned on, there should be a message, then who banned you. If there isn't a valid message, contact the moderator who banned you for further information ;)
Does it show when you try to join the server? If not, make a ban appeal and the Staff will help you out.
Hello, It appears I was the one who banned you: http://www.mineverse.com/threads/sebbemahl-hax-pulch-banned.69285/ Your ban should have ended by now, not sure why it isn't working. Locking & archiving.