It has already left Bangkok Post Center and it's not express.
This way, the priority for finding your mail would be higher.
The Internet has become quite convenient for buying all sorts of things.
The United States Postal Service offers Priority Mail International, Priority Mail Express International, and First Class Package International services.
One more bad experience is the delivery man put the parcel outside the door without asking me to come out collect! It stated that the parcels include international air mail, international small packet, flexipack international, and international air parcel, among other types of international parcel.
You are not obligated to answer customer inquiries, however, if you feel inclined to do so please be respectful.