I died my light brown hair dark brown, but it faded to blondeish green?

So I died my light brown hair a few months ago, blonde, then changed it back to a dark brown color. The dark brown color stayed for a month or so, but drastically changed to a pure blonde, but it has a greenish tint to it? What should I do? I almost want to just wait it out till I get my natural hair color back, but right now it looks terrible with a blondish green color all the way down but 3-4 inches of brown colored roots. Is there anyway to get the color out and just get my natural color back without dying it? Or should I put highlights on the top to even out the blonde in my hair? Suggestions please...