To ask for urgent advice on how to lighten my hair that I've just dyed

[Twinkletoenails]

Have just dyed my hair and left it on too long!! Gone a dark brown and way too dark for my colouring! Is there a shampoo that I can buy at tesco this eve?? Thanks all

If you still need something but Colourless Colour Remover - Boots/Superdrug/Asda

No bleach or ammonia, works brill and doesn't damage hair or smell eggy like colour b4