Here.

https://www.addiction.com/get-help/
https://en.wikipedia.org/wiki/Behavioral_addiction

I did some of the work for you, but you have to take the first step by yourself. Get your wife and child to help if needed. There's absolutely no need to disrespect your wife's wishes like this and lose her trust, and thus her and your child, for good. It's completely senseless.

Good luck!