Severe Chemical Damage

I had 1 1/2 inches of regrowth and wanted to bring the remainder of my hair to match my natural color.  My roots were light brown and the rest was dark brown almost black. My hair is long.

I went to my stylist who always cuts my hair; she totally messed up.  She was unable to match my roots so she decided to lift the color with bleach.  She left the bleach on for way too long under the hot dryer.  My hair is completely fried, falling out, distress, and will not let go of water (it took over 6 hours to air dry and felt like rubber).  I have severe chemical damage to my hair.

Unfortunately my hair is now a horrid color and gross.  She knew she messed up my hair and tried to shade it; it turned light-reddish-mud brown. I need to eventually bring it back to a decent color and revive it's health. 

What will not harm my hair at all, but bring it back to a nice color...henna, powder, anything?  I know I will need to chop off several inches of hair, but any miracles for reviving my hair?

Thanks a million,
Very Desperate