I had a similar thing happen. I contacted a school I am very interested in by email to see why i hadn't heard anything, and the emailed response was "we sent you a postcard AND email on October 15th asking for more information. Since you did not respond, we are closing your file." I never got the email OR postcard!!! Since I've been obsessively checking my mail and email for the last 4 months, I think I would remember. Anyway, they said I could send the info with a letter explaining why it was so late, and they would reopen my file, but what's the point? It's obvious that they won't believe that I didn't get both, and at this point I'm sure it would negatively affect my application. Oh well. 🙁