India Post — Regd parecel not delivered

Regd parcel rl[protected] sent on 16 07 2016 thro infopark kakkanad kochi kerala post office for usa. We contacted the post office official. No satisfactory reply. Lodged complaint no [protected] on 02 08 2016. No satisfactory reply received till date. Parcel is not delivered till date. Usa postal information site not showing receipt of parcel. Kindly let us know the status as on date. Whether it is lying with your department or dispatched to usa