I'm sorry you got declined. The recon number is 888-676-3695
from the FICO site.
I have read and was told they don't do recons, but you have nothing to lose by calling and trying, and it's practice as you may do something like this with Chase or Barclays in the future and you won't be as nervous next time having done it before.
Good luck and let us know how it works out. If worse comes to worse, ask them what you can do to get approved for their card as you'd really like to get into the Discover family and see what advice they can give you.