Hair dye issue

Hair dye issue

So normally I dye my hair a "dark golden brown" color in which the golden part makes my hair a tad lighter than a dark brown. I didn't see that color at the store the other day and bought a color that looked very similar. Needless to say, the color isn't close and my hair almost looks black. That and I screwed it up a bit to where some of my old color is showing through (ie: i missed a spot or two). Is there any way for me to not spend $100 at the salon to fix this problem? I would rather not dye my hair again, so is there some sort of home remedy to where I can put it on my hair and it will fade the color? My hair fades pretty badly anyways, but I would like it to fade faster than normal due to the fact this color is like 10 shades darker than what I like. TIA!
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