I agree with Jaz but it may not be too late. You made her an offer to let her have some of your valuable time and she let you down so show her you have better stuff to do, make it seem like no big deal and like you couldnt care less(next time you see her explain how you had a great time on the day you were meant to have met). Even if she does reply just be like really sorry, I am going out with my mates or whatever and say maybe we can do something another time. She shown you disinterest and you gotta do the same.