GoAir — lost baggage and very bad customer service

I am koushik sahoo. I travelled 25th june, bom-ccu, flight - g8 511. Seq no. 045, tag no. Tag no. Ccu [protected]
I had submitted my check in bag in go air check in counter. When i reached in ccu airport, my bag wasn't arrived with my flight. After enquiry in arrival airport staff told me that my bag was not added with my name. When searched bom airport i found out that my bag was not at airport. Then i launched fir in bom airport police station in 17th july.in bom airport they investigating, checked cctv footage, staff (Michel batties) said that the bag had left from mumbai airport. And staff of the ccu airport said that the bag was not delivered to kolkata. Meaning that the bag arrived another airport.
I called ahmedabad, delhi, bangalore airport they said no this type of reddish colour duffle trolley bag was not delivered there. Customer service is very very poor. So many things happen which i didn't tell here.in sort, the whole systems is corrupted. Still i am searching my bag since 26th june. Becuse so many important documents have in this bag. I mailed so many times in the airport with the bag pics. No reply.
Ph no. [protected]
E-mail - [protected]@gmail.com