Oh no! That sounds horrible! I know you said you don't trust the first place, but depending on how long it has been, they should offer to fix it for you for free...even though you said money wasn't an issue either, it's still the principal of it.
I've never been to a salon for a "professional" dye because I never trusted them for the reasons you've listed! I'd recommend doing a color remover first just to remove the orange tones and then giving it a day before coloring it with a slightly darker ash brown because it will fade over time to a lighter color. The last hair dye mistake I had involved going a very dark red - think black with reddish tints - and it was not the color I wanted at all! I ended up doing a bleach wash (also do not recommend) and then coloring over it with a brown that closely matched my roots. Once that faded a bit, I turned to henna because unlike you, I did want a reddish tint to my hair.
I'd suggest shopping around a bit, seeing what some stylists say, then doing your own research online before taking the plunge. Best of luck to you!
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