Why is my parcel stuck for more than 2 months?? why is it not moving?

My tracking ID is RB894384215CN . I am still waiting and its more than 2 months now. This service is totally ANNOYING !!! I am calling customs department in Calcutta but I am still not getting any help. Now no one is picking my call in Calcutta Foreign post. Please help me resolve my issue . Please call the concerned departments from your side and let me get my parcel !!!!