Indian Army — tvs jupiter fraud on olx

There is team of guys & they post new ads everyday to sell 2yr old TVS jupiter. Same jupiter Same number but place different. My father wasn't aware of this & he gave 29, 000 to the man who called him via Google Pay.

Here is link of all the ads which those fraudster added:-
https://www.olx.in/item/tvs-jupiter-good-condition-iid-[protected]
https://www.olx.in/item/its-petrol-iid-[protected]
https://www.olx.in/item/its-petrol-iid-[protected]

Here are more details:-
Mobile number they called:- [protected]
Google Pay Number:- [protected]

Paytm Bank Account Details:-
Name :- HAJRAKHATUL SINGH
Account number:[protected]
IFSC Code:- PYTM0123456
Address:- Army Cantt, Deolali
Pin Code:- 422502

Now who is responsible for this? Indian Army? Olx? My Father who is new to Internet who wanted to buy 2nd hand bike. PLease so something about this