Their emails doesn't appear to be very reliable. Not sure whether its their fault or the fault of it being lost in cyberspace.
When you placed your order you should have created an account with them.
Go and log in here: DramaQueen LLC
Once you have logged in, you should be able to see your previous orders listed.
Edit: Having seen your post on DQ forum and the dates, you're an international customer? It haven't been 2 weeks since your last email, there is a possibility that they've shipped your books without emailing you and your package haven't arrived yet. Also, I don't think its wise to put your paypal transaction number in a public forum. This is just my experience from other selling forums.