Have you seen the othet threads regarding this, in the very same part of the forum you posted in?
Free shells are very hard to come by that easily.
Many users will not share the secret of there xistance, as hundreds will then flock to them, and ruin the service that has been provided, up to the point, where they are shutdown.
Your best bet, is to make more friends on IRC< and see if you can get bots hosted with there connections.