Replicating hairdressers results because I’m harming my hair…

Hello guys, I want hairdressers advice, I keep getting messed up by hairdressers who keep getting the wrong hair colour. I have to go my roots every 4-6 weeks to cover my greys but I’m using semi permanent colour because ultimately I want to go lighter and put highlights in.

I found the perfect colour but it’s a box dye. Can anyone professionals, based on the colour and number of box dye attached, tell me how to use professional hair dye to achieve same colour.