Toning down foils

Hi beauties!
It’s been a while since I’ve been active here but I knew you ladies might have some suggestions.
I had some highlights done on my natural mid brown hair on Friday night. I asked for 1/4 head and showed pictures for the subtle effect I was after to enhance my natural tones.
Hairdresser went ahead and did 1/2 head of two tones, one a caramel/gold tone that complimented quite well but then also a really bright (almost white) blonde. I was quite shocked when she dried it off, it was super bright and just quite intense. I mentioned it was more than what I’d expected, so Saturday morning went back and they did a 9.3 toner (whatever that means) and it has certainly toned down the intensity and brightness, but it still feels like a lot going on!
Is there a way I can correct this a bit more on my own without going in with a box dye? I don’t really want to go back again to admit I still don’t love it…
I thought perhaps those shampoos designed for brunettes? Would that help tone it down more and blend it?
Please no judgement! I hadn’t coloured my hair in a lonnnnng time and I thought this salon did a great job last time.
Thanks!