Hello, all!
In October, I dyed my hair "medium auburn brown," a supposedly semi-permanent hair dye by Garnier Herbashine that promised to fade in 28 washes. At first, I hated it. Soon enough, though, it faded and I grew to like it.
27 days later, it had faded significantly enough that I was driven to dye my hair again - still with a semi-permanent color claiming to disappear in 28 washes, but this time the brand was Natural Instincts and the color was "raspberry créme." The result was a screaming fire-engine red color.
I bore it for about 4 weeks. When it still had barely faded, I used Color Oops on my hair and followed the instructions; still, my hair has a distinct light red/auburn coloring to it.
[Summary: Semi-permanent red 27 days semi-permanent red 4 weeks - Color Oops (and a whole bunch of shampoo treatments) = auburn]. I've tried everything to rid myself of this last bit of hair dye - clarifying shampoo, head & shoulders, dishwashing liquid, baking soda, and hot showers. But nothing has worked.
In short, what else can I do to return to my natural color?
Any help would be greatly appreciated! :)

The best, easiest way to fix hair color is to go to a professional stylist. Take a picture that accurately shows your natural hair color to your stylist or colorist, and they should be able to get you fixed up, no problem.