If I could I would give your daughter a hug. I can't imagine the pain she is feeling.
I know it's not the same, but I transferred to another school and the chapter I was hoping to affiliate with denied my affiliation. I was absolutely heartbroken. I didn't understand why one chapter thought I was good enough to be their sister but this one didn't. I was so upset to the point where I removed my ADPi license plate from my car, took off my lavalier and stopped wearing my letters. I felt betrayed and didn't want to be associated with the sorority. I eventually put my license plate holder back on my car, started wearing my lavalier and letters again. And eventually a wonderful sister explained to me the details of my affiliation fiasco. I'm now actively involved with my sorority. I'm in my second year of philanthropy chair for the local alum association and I'm on the committee to recolonize my chapter of initiation. Everything turned out wondefully because I just let time heal my wounds.
I know what happened to me and what happened to your daughter aren't the same situations, but like I said, time heals all wounds. This too will pass and she will only grow and become stronger because of it.
I'm sure I sound really corny, but