Bollocks, I've messed up my hair..:/

[MedusaIsHavingaBadHairday]

I have lightish reddish brown hair. Was coloured with Redken chromatics a few months ago bu after the summer hols has lightened up to a horrible brassy yellowish ginger.

So.... yesterday I decided a simple semi permanent in a light reddish brown would do the trick (Clairol no 92 ).

I now have.. deep redbrown lengths to my hair (long) with progressively lighter hair towards the roots, and very light on top..and where there was sneaky grey so VERY light it is basically orange!

HELP! Any suggestions?

I am actually at the point of having my long hair chopped off anyway (I'm 45 but grew it just to see if I could) so that might help but is there any way I can rectify the colour or do I need to suck it up and go to a hairdresser and hope they won't laugh

Sod's law I went back to work today too !