Re-dyeing Hair After a Botched Dye Job?

I've had black hair (dyed) for a couple years now. I waited about 2 months since last time I dyed it to go to a salon and bleach it to a middle brown tone. The stylist told me black bleached to red and wouldn't be able to do a dark ash brown as I wanted because it wouldn't lighten enough. She bleached it and the roots turned so white she said she had to put some red tones back in it to achieve brown.

After it was all done, my hair has at least 3 different colors and it's all splotchy. It looks like a botched attempt to have hyena hair. It's a bright reddish brown at the top, yellow blonde in some areas and the roots and then a dark wine brown in other areas. I'd be fine if it was at least even, but it's too bright and even lighter then I'd originally asked for! I wanted a dark ash brown and somehow ended up a mix of reddish blonde and brown. How long do I have to wait to dye it again to a darker color, so at least the color is even?