Indian Army — Iphone 11 on olx

I was looking to buy an iphone on olx and i saw this ad and i contacted the person and he said i am in army and currently staying in jalandhar cant and cannot go outside, so he convinced me to pay him 5000 in advance and he will courier the phone from army postal. I paid him 5000 and waited for the phone to arrive. After 4-5 hrs the delivery guy called and said that i have to pay the full price first and then he will get the confirmation from head office and then he will handover the device

I didnt believe the person and after that he is not picking up the call

Phone number of the seller : [protected]
Delivery person : [protected]