No answer for appeals process from anyone.

I was informed several weeks ago that my daughter was removed from my hospital plan due to a non-disclosure. While this was technically true, it was only because an admin mix-up on Discovery's part had delayed her being added to the policy until after her diagnosis. I was given an email address where I could appeal the decision, which I did the very next working day, but I never got a reply from this address or from the original address that informed me of the removal. I have tried both multiple times and have been completely ignored. I don't even know if they recognize that I have appealed!