How do i make my hair darker?

i have been using John Frieda Go Blonder shampoo and conditioner for about a month now. It is way too light and it looks reddish! my hair is naturally medium- light brown and now its strawberry blonde! is there any way i can get it back to my natural color without dying it?? Also does anyone know if this made my hair permanently like this, or if it will go away in a couple weeks? So are there any shampoos or something I can put in my hair to make it go back to normal as soon as possible?? Or less red would be fine too... but im sorry i just dont know what to do.. my hair looks awful! Thanks for helping me!