How can I wash out new permanent hair dye?

Steph🎃🍁

So I picked up a new hair color at the hair salon and it totally lied in advertising. The color it shown online and in the store was a light copper brown and when I used it on my hair which is the same color (bought for touch ups) it turned my hair super dark brown almost black! It's terrible and I fee like crying. Anyone know how to safely strip away the hair color without damaging it. I just hate how dark it is!