Used Goldwell 9N and it came out orange!

Yeah, sometimes neutral comes out redder than you'd expect. Every time I go brown, it always seems to fade through a reddish brown stage before going to dark blonde. She is right though, the only way to avoid that is to use a color with a green base, and if you've got blonde highlights or gray, it can make those go green. Maybe she can do the base color separate so she can use ash on that? Its not easy, keeping hair separate, you may have to discuss it and see what she can do. Since you are going to a pro, its best to let her fix it, tell her what you didn't like, and discuss what to do different with her.

As for now, violet shampoo or conditioner won't counter red or orange, but it will slightly tone down yellow (so it depends which color you've got now whether that will help or not). Clarifying shampoo may fade it, or it may make it more orange (that would happen only if you're seeing orange because your natural color was lifted to orange with the peroxide in the dye). Another stripper is baking soda mixed half and half with your regular shampoo (an alkaline approach if the acidic clarifying shampoo doesn't work). Again though, its also just stripping it, so it depends if the orange comes from the dye or if your hair is just orange because it was lifted to that shade whether it will work or not. You will need to condition really well after using either of those, they strip all the moisture from the hair.