Indian Army — fraudster take my 36150 in the name of army selling mobile on olx

I was looking to buy a mobile from olx and i found one, i contacted him and he told he will send phone by indian army courier, i payed him first 10k by paytm and after he sended me courier slip i sended 3 k and next day i got call from a courier boy and he told me to complete payment
And then i payed 14 k and then he told me to lay 9150 and he told i will get back 9000 after delivery
Then i payed 9150
After that they blocked me and i cannot do any thing further
I am attaching the proofs and numbers of the one

I need my hard earned money back
Please help me

Courier guy - [protected]
Avtar singh (Guy who deals) - voice call +[protected]