Hi! Thank you for your question. I highly suggest you seek a professional for the look you are going for! Toners cannot lift, they can only change the tone. So based on what you’re describing it sounds like you need to further bleach past the yellow state you’re in to get to a white. Then you can deposit a mixture of silver and lavender colors to achieve something similar to Kelly Osbourne’s color. I personally like to use the color line, Pravana, for these looks. This is a professional color line sold only to licensed stylists and colorists.
I hope this helps and best of luck to you on your color journey!