Are you fucking kidding me? Grow up and stop being such a BABY! First of all, you have no respect for your grandmother. Doesn't matter if she's complaining, I would never think once to tell my grandparents to STFU.
And all you do is play WOW all day huh? Well why does SHE have to pay the internet bill because of YOU? She's not using it, it's your leisure, not hers. You should be responsible for it if anything. And she's right, get your lazy *** up off the chair and get a job. You are seriously failing life right now if you can't take a step back and realize your own ignorance and stupidity. Either you inbred or just plain stupid, at least that is what you are making it seem like.
If you want to move out, then do something about it. You are fortunate your grandmother hasn't kicked you out yet. Why should she be spending her money on your leisures?