gold and money theft in kallada travels

Respected Sir,
Yesterday we booked the ticket from Ernakulum to Chennai in Kallada Travels at 7.36 pm bus from red bus. Our boarding point was Ernakulum-Vytilla corporation building and Dropping point is koyambedu, Chennai. Seat No. A1 ,A2.
Yesterday we purchased gold ( approx.. 4 lakhs) from Ernakulum and Rs. 10,000 in my hand bag. Other all the luggage we kept in dickey.
Our kallada bus no. is AR 01 J 5235. We booked for semi sleeper bus and we got sleeper bus. At the time of booking ticket they took money for insurance amount from per passenger.
Two drivers – Joby jose and Dhanapal, Conductor – Arun Das
Night bus stopped at two places for wash room( for 10 minutes only) at 2am and 8 am.
As we travelled many times in kallada travels and for us it is a trusted travels.
Due to this reason, for 10 minutes wash room break I didn’t take my hand bag with us and kept in our seat itself and gone for wash room break.
As we both are Senior Citizen and it is very difficult to carry our hand bag to wash room. So we kept my hand bag in our seat itself and covered the hand bag with kallada travels blanket and gone to wash room. As it is midnight 2 am all are sleeping, after coming from wash room I didn’t check my hand bag.
Again at 8 am also there is break for 10 minutes, Same way I kept my hand bag at seat and gone for wash room. Morning 8 am when I check my hand bag 4 lakhs gold in gold box, Rs.10,000 cash , my Watch and small purse with my personal accessories is missing. We are Senir citizen and Retired passenger. Our hard earned money we purchased gold. That gold is missing from kallada travels.
Immeditely we told drivers and conductor. They told us many excuses like people get down at Pondicherry, Some sleeping passenger have taken. They took it us in nearest police station and Police directed us to go back nearest police station where we took break.
Drivers are not willing to take back in nearest police station as they told passenger will be late or they are not ready to do proper arrangement for us.
Drivers and conductor is telling us to check all passengers bags.
Sir, What is the duty of driver and conductors inside the bus ?
It is the duty of driver and conductor to take care of our luggage when we go out for wash room or tea. After Pondicherry, no passenger gone out or came inside. I firmly believe my missing valuable things will be inside bus itself and it will be with drivers or conductor. They only know our moments and no. of luggages taken inside the bus.
We suspect only Drivers and Conductor. Immediate action should be taken against Drivers and Conductors.
Waiting for your positive response. Missing items should be given back immediately as we already paid for insurance with ticket.
We expect Excellent Service and Responsible Drivers, Conductors and Staff for Kallada travels.
Thanks