Hair like an abstract painting

Went to the hairdresser and asked for balayage and tips in which the hairdresser( Marisa) assured me she is competent. I left almost five hours later with hair almost 2cm shorter, choppy with straight hard edges, dalmatian spots in gold, copper and almost black roots. Hair dresser won't take responsibility for mistakes. I had another, professional, hairdresser look at my hair and she confirmed that this lady is *********** and clearly does not know what she is doing. Even after I confronted Marissa she would not apologise and blamed me for her mistakes.