Directions White Toner

I've used Directions hair dyes before, I've used the purple, red and black, all fantastic and for semi-perminent dyes they last for a good while, they are conditioner based dyes too which means my hair isn't damaged by the process. I've recently bleached my hair in hope of turning my hair white. I read good reveiws about this product and a few friends said it was good too. I finally tried it today. The directions say to leave to 15 minutes, I left it for 10. I still have yellowish bits at the end of my hair even though I concentrated on this area more and my crown/fringe have been left lilac not white. The rest of my hair is grey and faded lilac throughout. I had to rince my hair several times in order to fade the toner as much as possible but I've still been left with grey and lilac hair. It just proves that everyones hair is different and considering I only left it for 10 minutes I'd hate to think what colour it would be now if I'd left it for the full 15. The good things about this product is that its a great price; I got mine from Afflecks palace in Manchester for £3.50, it is a conditioner based dye so it won't ruin your hair and that the rest of the range can actually be trusted (they have vast colours available) All in all, not happy with the result but ah well at least its semi-perminant.