ok, obviously you didnt bother to do as i suggested, which was to go to gamesnet's website or you would have found the email addy to contact,
support@gamesnet.net or their forum
here which is where you will find the only ppl who can help you with this.
"Excessive connections from a single host" is the reason for the kline, which is self explanatory. I cant tell you how long the kline would last, only the admins at Gamesnet can.