Box dye

I have dyed my hair black and bleached to red over the years for the last 3 years I went back to black from red ( box dye ) I know lightening your hair at home isn't always best but I want to . So has anyone ever tried loreal color remover or The Vitamin c and shampoo method ? I recently did my hair a brown color my hair hasn't been in chemicals for 8 months my roots were pretty long so only that fresh hair turned brown and the rest is dark hair still with a reddish brown tone I want to lighten it and redo it brown