Hair advice - at home toning

Hi hi!

I have historically had my hair dyed in a salon but I don't have the money right now. My hair was looking brassy so I impulsively got an 'ash blonde' box dye without realizing that it had bleach in it, thinking it would tone down the brass. It has the opposite effect and now is very coppery (at the roots particularly).

Any advice for fixing this at home? I really don't want to shell out $400. I don't mind if its a bit darker but would rather it be a neutral or ashy tone as the warm colour doesn't suit my skintone. Any advice appreciated 🙏