Indian Army — Indian Army online fraud by an indian army soldier

I`m selling my mobile phone over Facebook Marketplace and one day one person msg me and confirm it`s available or not so i said it`s available and then he says what`s the last price we discussed about price and he says ok, and then he asked where it will be available, so i confirmed my location then he said payment will be online, i said ok no issue, then he told me i`m sending the amount what are you using i.e Paytm, Gpay, Phone pay, i confirmed my choice for phone pay then he ask for my phone pay no. i shared my no then he call and inform me that his brother will be take the phone as he is outside from the city, then he send 1 rupees coupon and it`s received by me then he send another coupon of 13000/- for my payment and it`s deducted from my account and then he says there is some server issue he send again another coupon and it`s again deducted from my account 13000/- now my account is zero, he says he is a army soldier and he send his ID card i believed him and now he is not answering the calls kindly help me in this matter.