Hi, I have platinum hair and I used a semi permanent hair dye at the beginning of November. It was the bleach London rose colour and it states it washes out completely after 1-3 washes. I have washed my hair twice a week since then and it’s still not fully out!! My roots are black as they need bleaching again and then I just have random pink tinges to my hair, some of it is blonde and some is a pale pink. I contacted bleach London and they suggested putting shampoo onto dry hair and leaving it for 20 minutes and it didn’t do anything. How do I get it out???