Indian Army — phone scam

I found this guy named vikas patel on olx who wanted to sell him phone oneplus 6t at 22000. For which he asked me that he works at rajasthan army. He shared his canteen smart card, aadhar card and driving license. After which he told me that he is sending the phone via army courier and i will recieve it in 18 to 20 hours. He sent me a slip of indian army with address details to which we can rely that he's genuine. He asked me to send 5000 in advance to which i was sent paytm number. I did it from upi to his number given. Then later next day a guy calls me that i'm 30 minutes away from your location and will come to your place as i recieve mail from headquarter. After which vikas calls me and tells that i need to deposit full money so the delivery guy gets a mail from the headquarter. I denied to it. He's calls me again to ask for money as the delivery guy harasses him for mail, which is an excuse to get money out. Later i have logged a complaint against him in police station and in front of police inspector i spoke with him where he's unknown to it. The police inspector heard him speaking and they said will find out if he's real army guy or fake and will look into the matter. It's a request to all that don't pay money online to anyone until you have your product in front of you.