hey my bestfriend did that too, and she hated it because it got so red. there is this thing that you can get at the drug store for like 10 dollars to take out all the color, and then get whatever color you like.
if you just die right over it with brown or blonde it will remain redish. if you want it totally gone without paying 10 dollars for getting the color out then i would die it a dark black. black changes everything! (: