How can I get my hair back to blonde?

help, my hair is a light ash blonde and yesterday I put a blue/black colour on my underneath bits and now I regret it and hate it. It looks really blue and I desperately
want it back to blonde.I tried to put a blonde colour in it tonight but it didnt do a thing.
I cant afford to go to a salon and was wondering if anyone knows a good product to get it blonde again that I can do at home.

I don't know the exact name, but there's a product that can strip your hair of all color

they sell it at wal mart and it's not too expensive.
You'll just have to re-bleach your hair after you strip it

be careful because that many chemicals can fry your hair
=)

You look hot for that picture, for your age.

thanks, and guess what? I got my hair back to normal just before.I bought this really intense blonde colour and it actually got rid of the blue,the colour is slightly copperish
but its only underneath and it doesnt look too bad . Im so damm relieved, I thought I was going to be stuck like that forever !! phew...