Why is my hair color fading so fast?

4 days ago i went to the salon and dyed my hair burgundy i had blonde highlights before that so i decided to do one color. My hair stylist had told me that the burgundy hair color is permanent and won't come off until you're hair grows out completely..Ever since that day i washed my hair twice since i figured its permanent it won't come off..Now my hair turned dark brown and i basically have a little bit of burgundy left is it cause burgundy washes off fast and doesn't last? or maybe because i had my hair bleached before?????