I dyed my grey hair with semi-color 'camel from Redken. I don't like the dark resulting hair. How can I get bark my grey hair right away??

Make an appointment at the salon and speak to a hair stylist. If its an semi color it should start fading away after awhile, but if you're looking for something a little more immediate, a stylist may be able to help you. If you should decide to color your hair again in the future, I'd recommend to get it done by them rather than at home.