How long past 24h did you send that EMT? Often I've noticed that it takes a few for the EMT to arrive at the receiver's end.
It is also customary to allow 24h or so for a reply to e-mail. Unless you had sent that EMT more than 30h ago, you're jumping the gun. GunGas is not a large corporation - they're a small operation busy fulfilling orders. Give it a little time.