I have a client that wants to go grey/silver. Iv bleached the hair using Lomé Paris Bleach and 9%. Taken her to a level 9/10 Iv toned the hair and used purple shampoo, her mid length and ends and a beautiful platinum blonde but roots are still rather brassy it just don’t change. How can I remove this and what colours would I use to take her grey.. she is one of the hardest Iv felt with and her hair just doesn’t take to anything very well to the point a few stylists have given up on her.