I'm flabbergasted. If I tell my contractor that I want white grout in my tile and he uses blue, guess what. He's gone. If there was a good reason why he used blue, HE SHOULD HAVE DISCUSSED THIS WITH ME FIRST, back when I first told him I wanted white! I'm amazed that you told her specifically what you wanted and she totally disregarded your instructions, not once, not twice, but THREE times.