RUINING MY HAIR!!!!!

From long luscious dark brown hair to brittle orange yellow hair with brown ends...I went to La Sorellas and asked Bernice to have my long hair lightened from dark to lighter brown. I told her I know that it is a long process to lighten hair, Bernice said because I used box color (it is a process where they will bleach my hair and then color it 1 color brown afterwards. She gave me a brochure about Olaplex that it protect the hair. She put bleach with foil over ALL my hair, put me under a dryer half an hour, checked it and repeat another 15 minutes. There after foils was removed and with her fingers she run the bleach to my now yellow/orange hair at the top and brown hair on the bottom for another 5 min. After wash she applied 2 colors to the hair, no cutting just a blow wave and I left the salon 3 hours later -.I was SHOCKED, I went back the following day, Sheree said it is part of the process to have orange hair for 4 weeks. After washing my hair I had brittle hair. Phoned the salon sobbing. Went back and Sheree said Bernice LEFT THE BLEACH IN FAR TOO LONG. She coloured my hair BACK to a dark brown for free (SIC). I had to cut it, and had to buy products. MY HAIR IS RUINED