Sorry for the slow reply, I don't often check the forums on work days since I work long shifts. Anyways, the link probably isn't working for you because it's an invite link and you have already joined the server (though you do not have full access yet as we are still waiting for you to perform a step that our Bot says you must do before we give access). An invite link doesn't work for a server you've already joined. You can either go to
http://discord.gg/ or access it via discord's desktop/mobile app.