Any hairdressers out there or colourist that can help me?

[Glamourcide]

Yeah hun, 20vol will take the brown out no worries - like I said, it might take a couple of sessions to strip it all out but I've used 20vol to get black out and it's worked fine - 30vol is very hard to work with as it burns easily and 40vol I won't touch with a ten-foot pole, nor will most hairdressers I know! It's pretty scary stuff Just use 20vol, with the powder, then tone when you're finished and see how close you are to blonde - it might be a bit orangey or still brown but another bleach or two over the space of a week or so should get the rest of it lifted out for you HTH!

(ETA: If it helps any, you can check out my transition from black to blonde (with a quick stopover in the land of red!) here)