Help, need advice please!!

I need some advice. I had hair that was dyed medium golden/red brown, with about 1 inch of roots, which are light to medium ash brown. I went to a salon, and asked to be lightened to blond. I told the girl I did NOT want golden blond, I wanted either ash or neutral medium blond. She put bleach on all my roots, then on the rest of the hair. She put me under the dryer. After rinsing, she applied the color. She told me afterward that she applied light golden blond! I think the brand is Jalyd. The result is my roots are almost white, and the parts that were dyed medium brown are now a peachy golden, dark blond color. It is horrible!! I have an appointment to have them fix it. What would be the best solution? Should I have them bleach the dyed, darker part of my hair to match the roots, then tone it? Or should I have the roots tinted darker, and the whole thing tinted ash to neutralize the peach/gold? I was a hairstylist years ago, so I know something about color, but need advice on this. I don't know if I trust this girl to fix it or not. Thanks!!

Thanks alot, I appreciate it!