Tamilnadu Tourism Development Corporation - Theft By Tourism Employee

I have booked and travelled inone Daily Tirupati Tour From Chennai by TTDC Tamil Nadu Tourism Development Corporation. After returning from trip we have dropped where have started due to driver and tourist guide urgency we need to get down soon due this I forgot to get my phone in seat pocket. Within few minutes I have informed the tourist that I kept my phone in the seat pocket form my dad phone and tourist guide said that the bus left from the place so he will inform driver and the office. However when we went enquiry in office next to collect my phone no response and saying check with depo officer and when we went to bus depo. The officer informed no such item he has retrieved. I am suspecting the tourist guide as he is not providing the driver number.