I echo the other posters and I'm sorry you had such a horrifying experience!! Sounds like customer service just added insult to injury.
I know this doesn't help at all, but I feel like I could've done what you wanted. I'm not a professional colorist in any way I just play around with color and have done blue highlights.
I thought you wanted a whole head of pastel purple and the big ordeal made sense until I saw the pics.
This is why I'm so afraid of letting stylists touch my color.