Dyed My hair mahogany (cheryl coles colour) 28 washes, But I hate It! Want too Go back...?

To avoid damaging your hair further but to still hasten the process, just wash your hair-as much as possible-with really hot water-but obviously not too hot to where it burns. Hot water seeps dye out of hair. It should honestly be almost out, if you that, fairly soon and then you will be OK to dye it again. :)