My hair dye always washes out

I have dyed my hair dark brown two times already. The first time was a few months ago and I just did it again last week. I did it on thursday and today is friday a week later. I noticed on wed that the top already lost the brown color but the rest of my hair is still dark brown. it looks horrible! I used garnier the second time and yes it was permanent. I really dont want to pay a lot to get it done professionally. any suggestions?

well after you dye it your not suposed to wash it for a day

well after you dye it your not suposed to wash it for a day

what is your natural color and why do you want to keep dying it?

my natural hair color is light brown and I just want a change.

and no I did wait a day to wash it. I washed it on saturday morning. so more than a day. this has happened before, the first time I tried dying it dark brown.

get some other product or pro