My hair now has GREEN undertones!! after bleaching and colouring with ash tone?

Im sorry but you should not try to accomplish on your own what some people take years to get to. You should stay out of the hair color isle and go see a real colorist. What you have done will not be a easy fix especially if you have been using peroxide developers. The more layers you put on your hair the more money you will have to pay to get it fixed. When you start using the extreme red's purple's and green's ( think about art class from elementary school) you get muck.