Hmm if you wanna fix it, either call up the number on the box and yell at them, or go get it done which i know can be expensivo... so what IIIIIIII would do.. hehe.. is call up the place cos sometimes they atually do know what to do in those situations. They'll prolly tell you to dye your hair a couple shades lighter than the rest of the hair, because the bleached parts will absorb color super quick so they'll turn out way dark. Even a non-permanent dye would work, i'm pretty sure, it won't wash out of bleached hair. And then in a little while you can try highlighting again once it like, normalizes itself. Haha. Ive done this stuff so many times.
A few years ago, I dyed my hair a brown/reddish color, and it wasn't as dark as I wanted it, so stupid me, I went and put the same shade over top of it again, thinking I should just double the color, and it will make it darker.....stupid me. It turned my hair almost the same color as Ronald McDonald's hair. It was AWFUL!!!! I called the number on the box, and apparently, when you put red on top of red, the brown gets cancelled out. So all I had to do was put a bsic brown over top, and it fixed it. That was my worst hair nightmare. It was so embarrassing. I looked like a freak.