my hair is FRIEDDDD, help please :[

okay so here's the back story:
-my hair is naturally black
-in july of last year, i bleached my virgin hair
-it turned pumpkin orange
-i bleached it 4 more times, and it was a strawberry blonde, but never got past the yellow stage despite all the bleaching.
-in september, i dyed it pink, then purple about a week later.
-in october, i attempted to take out all the color, and used a volume 50 delveloper to bleach my hair. and i knew basically NOTHING about dying hair, as you can see lol. so a bunch of it fell out, and the little that was left, felt like hay. ive tried ever deep conditioning method you can think of. ive even gone to two separate salons to try to get help. nothing seems to make it healthier.  its grown out about 3 inches, and the ends are a little less dry, but still noticably dead.

okay so here are my two questions:
1) what can i use on naturally black roots, to get that Barbie, white blonde color, without frying my hair anymore.
and 2) what method would you suggest for trying to restore a bit of health to the parts of my hair that are pretty dead.

(oh and btw, when i say that i fried my hair, i literally mean, i left the bleach on my whole head for about 3 hours, AND when it gets wet, if i attempt to comb it out, it just pulls like a rubberband and feels almost elastic until the point that it snaps off. and when its dry, it looks like alpaca fur)

haha thanks for the help