Getting Semi Permanent Dye Out??

Ok so I few weeks ago I dyed my hair a cool blue. It was fun for a while but now it's fading and I'm missing my naturally blonde locks. I've tried all the things (dandruff shampoo, bath salts, dish soap (oof), baking soda, etc.) and it won't come out :/. It's just semi permanent so it's not like I'm stuck I'm just very impatient and miss my hair.

Anyone have any tips? I'll try anything.

Ok maybe not *everything*