Indian Army — money asking

Address:	530013
Website:	Olx

Good evening sir!
I'm trying to buy a mobile on olx
Some one contact me he asked extra 2500 i sended to him.
Later some one call to me he told i'm a delivery boy you gettl a courier so you have to pay 5150 dipost & you will get 5100 refund
Later i call to him. I asked, i don't want your mobile. So pls send me money. I couldn't pay that amount. I told to him.
He answered to i don't give the money and i'm a indian army their is no any refund amount. So, don't call to me. He will be cut the phone call +[protected] this is his phone number.
He send some id proofs