Frustrated Hair Color

First of all, I have gone to a few different salons to have my hair colored.  I don't want anything drastic, but I wanted like a darker red/brown color, just a change from my black hair. (I'm Filipino) I've spent a few hundred dollars already at "professional" salons.  Now I have premature grey (I'm only 24, and it's on one part of my head, all the women in my family have this, and I do dye this part of my head every 6 weeks).  I'm at my wits end. One spot, I had nice red color, but only on part of my head. Ended up using a semi permanent dye. I had another salon, a few months later turned orange after 3 days. Dyed it black using semipermanent. A few months ago, I had a great haircut, asked the stylist to dye it, um, it was just orange, and I left really upset.  Now I'm looking into coloring my hair at home since it seems I've just had bad luck with salons. I need suggestions from people (it's been almost 3 months since I used to semipermanent, and one spot of my head does have hair dye to cover up grey) on how to go about doing this.  I just want to go really dark reddish brown,nothing too drastic. Thanks!