My blonde hair tnd orange after keratin straighteninging tmtI?

I had a keratin treatment yest to straighten my blonde hair.. 1/2 through she stopped as my hair was turning orange.. $250 and I have straight orange hair.. What can I use that is sulfate free to tone down the orange on my blonde hair.. Stylist said she has never seen this happen before and is taking no responsibility for it..I can not use regular hair dye for 3 weeks.