Tell me how to change hair that turned orange with medium blonde #8, back to dk or med blonde

Check the bottle that you used for the correct number (see that it is 8 medium blonde.) I've always been blonde but once used my usual shade and it turned out jet black because the wrong bottle was in the right box. Not that orange is available but it might have been too far off from your natural color. Has your hair been in a clorine pool? It could be a chemical reaction. Good luck!