I recently ordered from sammys dress and chose expedited shipping also. My package was delivered via DHL. I think you should email them and inform them whats going on. Although you checked out as a guest, you should've received a confirmation email stating you placed an order. When your order ship they also send you another email notifying you and it will tell you what carrier is responsible for delivering your merchandise. They will reply to your email in a timely manner. One last thing be sure to include your order number. Hope this was helpful!