Well recently I have dyed my hair blonde, I no longer really like the color and was wondering how I could get my old color back? I have heard of color zap,but everyone says different, do you think it would work on me? And what can I do to get it out, I really regret dyeing it PERMANENT, but I am sure there is something I can do to get rid of the color

If there is something I can do to get my color back please can you help and answer this questions asap thank you very very much x