Indian Army — Sell bike on giving add in OLX and do fraud in name of Army transport service to deliver bike

He(Gurnam Singh [protected]) put add in olx to sell bike i contact to purchase. he said i am in indian army and transfer ludhiana to wagah border so i sell bike urgently, he asked me to pay 2150 rupee for transportation of bike from army transport service amritsar. i asked him to send some proof of identification he sent me his adhaar card, army canteen service card which i have attached in evidence. i paid 2150 for it now he asked 4999 rupee more for GPS and said when bike reached ludhiana you have to pay rest payment. when he say more amount to send i have misdoubt on him and i did not send more amount. now i asked to cancel deal he said you have to pay 320 rupees for cancellation charges. i paid 320 again and sent screenshot proof of payment. now he said sent 320 again because due to some error in refund process.
Now i realized he is fraud. he said if you do not pay again 320 i will not refund amount.