Does anyone work at the Post Office?

I ordered text books which was sent from USA via DHL Germany and landed up at the EMS office. Delivery was done on 20 Aug to the EMS office. I've being calling every day to find out where my delivery is and when I will get it. On the website it says unsuccessful delivery but no one has been to my house. I cannot even get through on the EMS line. Today I was given the drivers details by the call centre. He is not taking my calls and not letting me know if he has my package. What the he'll is going on? <br> <br> Horrible service which I actually paid for. Can someone tell me where is my books?