My daughter dyed her blonde hair brown, it looked horriable so we used oops color remover
The color was still bad so we took her in for a malibu treatment, still bad.We put blonde color on and now she has green hair!
What should we do?

You have to neutralize the color by using a red base color. Preferably the same level. The safe way would be to take her to a color expert. You'll probably still mess it up color is chemistry. Red neutralizes green. I am a hair stylist.