Credit

This company sent me an email saying they had reached a decision on my credit card application.  I did not apply for a credit card with them, but they want the last 4 of my social, my zip code, and phone number to verify the application.  I put it in to see what was going on, I have applied for a few credit cards but not sure if this was one of them, I dont remember it being one.  It says my application cannot be found.  I sent them an email and they said they would get back to me in 24 hours.  Should I be worried? bdegraffenried@student..ccc.edu if anyone can give me any feedback.