Help please

everyone I'm new here so let me start, I wanted to go a very bright red so decided on the hicolor in magenta and red, attempted my first dye and besides the roots hardly showed up, I finally figure out it's cause my hair isn't all virgin I have dark brown dye close to my natural color half way down my hair then from the mid section to the ends it was black from another past dye job, and as you will figure out I'm in no way a hair stylist and most of the time have no idea what I'm doing. so I decide to just lighten my hair (bleach it) with a ion lightening kit with took me too processes but no big deal, the 1st attempt worked well mostly a light yellow/blonde shade besides a few orange bits at the end of my hair so second process took care of that.
My next attempt at dying my hair with a 20 developer (used 30 the first time) it turned my roots a bright colour and some of under layers of my hair too but my top layers were still a yellow, so I went in a 3rd time ( leaving my hair to rest for a bit and using hair masks to make sure I didn't damage it too much) this time I went in with 30 developer again thinking maybe the 30 didn't work the 1st time was cause of all the dark colors I already had in it, so after the last process my hair is a bit damaged and has only gone to now a light baby pink color while my roots are bright pink red, it don't look bad just not what I wanted, does anyone have any suggestion what I could try to get it a bright redish color, higher developer, leave it on for longer or may be reasons as why it didn't work is my hair is damage so will not take the color I have no idea any help would be great, sorry I ranted on better you hear what I've done and tried already.