The Professional Couriers — Missing important parcel

This is regarding courier CCU[protected]..which was posted from Kolkata on7th November. But it was never received however their system says it is delivered in Bangalore address on 9th November.This is a very urgent parcel...contains insurance bills worth 60000 which need to be reimbursed plus also it has a cheque woth 30000. I tried reaching every customer care no and email and nothing works and no one answers any calls. I am now going to file a suit and an FIR if I dont get my parcel