India Post — no update about my parcel.

I have a parcel to be delivered from Singapore with tracking number RP[protected]SG. It was dispatched from Singapore post on 6th to overseas country and it usually takes 3 days to reach Mumbai Airport sorting office. It's been more than 2 weeks of no updates. On contacting Singapore post, they mentioned that the parcel has been despatched by them and should have reached India by now and suggested me to contact local post office. But local post office says they don't know anything about it.
I am quite worried whether its lost or misplaced. Please let me know the parcel status and when will I receive it.