Sorry to hear about your daughter's plight, but she certainly can still get a genuine ticket to the festival, without having to go to touts on eBay or Viagogo - if she moves fast.
Tickets are still available from official sellers if you go to the right ones. Stargreen is the one I've been keeping an eye on and they haven't sold out yet:
http://www.stargreen...ng_26-aug_29372
(Scroll to the bottom of the page to buy.)
They're an official ticket outlet (listed on the festival site) and if you're in London they even have an office in Oxford Circus, so you can go and buy direct if you want to be absolutely sure of not getting ripped off.
I've bought tickets from See Tickets very close to the festival before too - often they release returns or extra tickets without announcing it officially.
(Edited to add: I'm not sure where you stand financially and if your daughter can afford another ticket, but I think if she paid by any credit card or a Visa debit card then she should have a very good chance of getting the cash back from her card issuer.)
Edited by johnmcga, 12 August 2011 - 09:16 AM.