Delivery time for parcel: No. RB080292340CN

Hello!
I have been waiting for 3 parcels. The first 2 arrived after 20 days, but the 3rd has not arrived yet, even though it was shipped form China on 08/07/2013.
Could you please help me track it and find out why is has delayed so much?
I have ordered bridesmaids dresses and I need to have them soo.....before the wedding ! ;-)

thank you very much