Splat red hair dye horror?

I just dyed my hair with Splat luscious rasberries hair dye. My hair is now pink. Does anyone know a way to maybe make it a little darker? I don't mind the pink I guess, I just want it darker. Should I buy another box, use the dye and leave it in for a couple of minutes? Also, I have dark splotches that the bleach didn't get too. Any tips?