Parcel showing NULL status as on 19th Nov' 2013

Hi My Parcel sent via china post to india bearing tracking no. RB535895189CN has been ordered online by me as on 13th nov 2013 and dispatched on 16th Nov, at the Airport on 18th Nov and now is showing Null as on 19th Nov 2013. please help as i urgently require my parcel before christmas. And its already been 33 days since i placed my order and i was promised delivert between 18-25days. Please help.