Does black henna fade from hair? Help!

Dear friends,

I have naturally dark brownish black hair. I dyed it brown many months ago, which faded. My hair had been a nice dark brown for months but thought of having darker hair again. So I had black henna at home. The brand is Black Rose. I dyed it a few days ago on Tuesday but realized I don't like it much. My hair is jet black now. I've been washing it daily since. I kept oil in my hair for hours and used an ACV rinse. Every time I wash my hair, I still see the dye coming out.

I would like to know if the black henna from my hair will ever fade. I want it dark brown again. If it will fade and I wash my hair daily, how long will it take to fade? Please help me. I don't know what to do to fix my hair.

Thank you. God bless.