Best purple toning shampoo/conditioner/mask - please help!

[upstairsdownstairscardboardbox]

I made an expensive mistake and went to another hairdresser when mine was fully booked. My roots were given a horrible warm coppery undertone and even after 2 further apps with my regular salon it is peeping thru.
Which shampoos/conditioners work best? I have tried the Kerastase one and it seemed good but it is very expensive so wondered what else might do the trick.

Tanks

I love John Frieda’s purple and it’s easily accessible in the supermarket. I used to use Provoke Intensive but actually stopped because it was too powerful and my hair was turning nearly white, so maybe that’s the one you need!

I use Kerastase Blond absolu. Yes it’s expensive but it’s good and crucially not drying. You do get what you pay for.

Thank you

Malibu sachets and shampoo and conditioner from Amazon. I’ve used the sachets several times to remove brassiness from my own hair and hair extensions.

https://amzn.eu/d/1CgU3Mm

Provoke hair mask I’ve found the best. Leave it on for 5-10 mins

Fanola No Yellow shampoo is really good, you can get it on Amazon.

Use a blue one to get rid of orangey tones. Aussie have one but there are others .