Can you get some of the pink out with a peroxide free colour remover like Color Oops?
I had heard of others doing adding coconut oil to the mix, there is lauric acid (the main fatty acid in coconut oil) in the product I use anyway, so I just chucked in a couple of teaspoons of melted oil and it worked fine. I do it as well as treatments on dry hair in the days before not instead.
Remember that a lot of the damage is not visible to the naked eye and not on the surface, the hair is weakened from the inside. Even if you notice no difference it doesn't mean it hasn't had an effect.
2a-2c, medium texture, porous/ colour treated. Three years CG, growing out mechanical and chemical damage = breakage and very high porosity. Past armpit length heading for waist.
CO-wash: Inecto coconut
Treatments: Komaza Matani, coconut oil, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume, Inecto argan
Styler: Umberto Giannini jelly, Boots Essentials gel
Experimenting with: going back to basics