We can't do anything about this, only Gamesnet can. From their website (which is usually a good place to start when looking for info like this):
Why am I k-lined and what does this mean?
If you're getting a message saying that you're k-lined from the network, this means you are banned from GamesNET. A k-line is a server ban. GamesNET only sets g-lines, which sets bans all of our servers. When you are denied access, there will be a reason in the error message. Possible reasons are for trojans, insecure proxyies, clone flooding and AUP violations. K-lines with the message "Excessive connections from a single host." only last 1 hour. If you feel you have been banned in error, please send an email to
support@gamesnet.net including the entire error message.