LOL at "even my HUSBAND"!!! (cos men never notice a bean)
Ideally you would go back to salon and get your usual/the most experienced stylist to do it again.
however having had hair disasters myself, the last thing you want to do is go back there (again). Plus any more permanent salon colour won't help the condition.
If you want to try a colour yourself do a strand test first using a white saucer. Wash & blow dry strand as normal then hold it up against your normal hair.
I have highlighted hair and have used wash in/wash outs (little foil sachets) for subtle colour changes. I don't leave them on the full time tho - I buy several so I can build it up gradually. It grabs onto highlighted hair far more than you'd think.
I go for the lightest ash wash in/wash out (ie the one that comes an alarming shade of PURPLE)! as it soothes orange tones. it is also good for putting a pale blonde back in when it goes the other way and the highlights are grey rather than blonde.
Alternatively John Frieda highlight activating range is good for cleaning up highlights, the platinum shades one.
Finally, it will fade out over a few weeks so if you can bear it I wouldn't do anything at all (bar maybe one little wash in wash out). Three colour sessions in one week is a lot for hair to take. Try & give it a few weeks to harden up before doing anything else.
Sympathies cos I've been there countless times and it's HORRIBLE, and good luck!