Indian Army — Regarding car selling on olx

Address:

The initial transport was from Patna

I have received an add on olx that a person is selling Innova car on olx which looks in good condition as per the photos he added and the price was way to cheaper so I thought of buying it and dropped him a message . He reverted me his number and asked me if I want it to be delivered at my doorsteps which I agreed and told me if I don’t like it after inspection he will refund the amount.
Next day he asked me for 3150 as security money for transport and gave trust that an army person will never cheat anyone so I paid and he sent me a receipt which has total deal amount, online paid amount and transport amount mentioned and told me it will be delivered in 24 hours to me. Next day I received a call from courier boy from Faizabad who asked me to pay 11200 for courier fee which I denied and asked him to visit home first . After that they never called me as they tried enough me to pay but I did not.
The name of the person was Binay Kumar who was the seller and he sent me RC and all as well