How to kick off games addiction and re-focus on study for teenagers who have spending years gaming?

Hook on internet games and unwilling to kick off. Peer influence is too great. Must on to be on par. How to turn back or to balance. My kid will not listen to me, as he has his own logic and do not bother much.How to kick off games addiction and re-focus on study for teenagers who have spending years gaming?
Perhaps you can relay to him what happened to me, a game addict: I now have Carpal Tunnel syndrome in both wrists and have to have an operation. I have gained a ton of weight which has made my sore joints hurt even more. Ask him if he doesn't get tired of the boring, repetitive nature of gaming (if you really analyze it). It really makes you stupid, you're not interested in anything else, not even your so-called friends. You must try and offer a better alternative to him. After a while nothing in real life seems as exciting as gaming. I don't quite know what else to say to you. It's a bit like being an alcoholic - you have to want to quit yourself. PS maybe he can just not get anymore pocket money until his grades improve (have the internet connection cut off) and then he won't be able to buy games.How to kick off games addiction and re-focus on study for teenagers who have spending years gaming?
Try to make him a schedule and get him to stick to it. Like say.. If you finish your homework by a certain time, you can play for a few hours or so. And don't forcefully try to stop him by taking away his console and making him study and such. That'll only make him rebel.
He's spent years on gaming? Just ban him from the computer. He'll get the picture when he's grounded and find something else to do.