I bleached the bottom half of my hair , I tried dying it black it looked good for a week or so , then slowly started washing out ..... Now I have this ugly *** orange/yellow color in my hair . WHAT DO I HAVE TO DO TO GET IT TO STAY DARK WITHOUT WASHING OUT AGAIN?

http://www.sallybeauty.com/professional-protein-filler/CLRFUL2,default,pd.html?cgid=Hair05-07

That there is a color filler, which is sorta like a primer for your hair color to grab on to. It's also good to use between colors to keep your hair color fresh. I used it when I went from blonde to dark brown and its made suuuuuch a big difference! And its pretty cheap, too.