Definitely would not buy again

I purchased this to tone down my brassiness my light blonde hair. I asked the sales lady from Sally Beauty which I love the store. I asked if my hair would turn a funky green or grey? She said maybe but probably not, so I bought it. I got home rinsed and applied to my roots then pulled down to my ends and left for 2 minutes and I took the towel off and all I saw was dark grey, I called the store and she said to wash it a few times and it’ll be fine. I still have grey ends my hair is mid back length. I would never buy this purple shampoo again.