I think you should email the Consulate directly using their enquiry form. I had a similar situation. When they delivered P3, I was out of the country hence unreachable. It was only after 3 weeks I realized it shouldn't have been taking so long so I wrote to them to ask about my case. They called me the next day immediately, telling me that they couldn't reach me 3 weeks ago and will try to mail it to me again. After a few days, I finally received the P3.
Hope it helps!
Also, just a heads up that the Consulate in Guangzhou seems to be having IT problems lately... it might be all be related. I finished my interview on Apr 10th and still have not received the passport...
