Is it possible to get my hair from jet black to even a brown?

basically, my natural colour is light brown, i also used to have alot of blond highlights. When i was about 12 i found a bottle of black die and put it in my hair ( i'm 15 now) so basically i've had black hair for 3 years. i only use bottle dies to do my roots about every 2 months sometimes more. About a year ago i went to a salon to try and get the black out of my hair, and because they salon had only trainees the boss would not allow them to try and get my hair a light brown colour incase it broke. they got it like a copperish colour in some places and some places were black. I just want a simple technique to simly strip the colour from my hair as im really sick of black hair, i just want to get rid of it and even get my hair to a medium brown colour,, if anyone know how PLEASE let me know MUCH APPRECIATED!!