Indian Army — Fraudulent activity on sale of bike

Address:

Bangalore

I saw a FB post as sale of Royal Enfield bike by a Army Sepoy. He told he is transferring to Ahmedabad. His name Mahesh Sule. Then he told he will be courier the bike and charged as Rs. 2100. Then the courier person his name Praveen and told he is going to deliver but we should pay Rs. 11, 550 and again asked us to pay Rs. 11, 000 and Rs.50 seperately and still want us to pay Rs. 9, 000. We asked him for refund. And now he is not attending our call. This way we paid Rs. 25, 000 to this guy. How to get the money back.?