Red hair

Hi there all

Really need some help with my hair. I was dying it myself copper brown for years level 6ish. I decided to have my hair done at hairdressers about 3 years ago now I wanted to go lighter have hilights etc. However my hair always came out virtually black and gold. Nothing what I wanted at all

(I don’t know why I kept going back lol)

The last 8 months I’ve wanted to go quite a bright red. Not too bright as my job would tell me off :). The lightest red they have is 6.88 igora royal which came out pretty dark to be honest. I asked about how we could get it lighter and she said hilights. .... again. So my last visit I had 6.88 all over some hilights through and she put a red toner over those. I can see them in places but not as much or as bright as I thought. ...it’s like a deeep red with some lighter red pieces.
I’m honestly getting fed up now I’ve spent a. Ton of money there and I never walk out happy. It’s always really dark. And just keep getting told. Have more hilights then it ends up the colour they suggest is dark anyway. Sigh

What’s the procedure now for these hilights. She booked me in for a colour in 7 weeks. Would she just use 6.88 all over? Would this show the hilights? Cause to be honest the colours wishy washy and not the bold red I want. ;(. If I got say a live xxl dye and did it myself would the hilights still show through?
What dyes would I go for and how would I dye it so I don’t ruin the hilights. I’m red all over it’s just those hilhhted sections are just slightly lighter red.