Illegal deductions made via Google- pay account during selling deal via OLX apparently by an Indian

Mr. Avdes Kumar(Mobile No. 9394405280) contacted me on 8910856447 around 1037 Hrs on 08-Jun-2021 with regards to selling of old port-holes via OLX application (Ad ID: 1635360326), and shown interest in purchasing the same. He further stated that his brother, Mr. Roshan Singh (Mobile No.8099546552) would call me for payment procedure.
Mr. Roshan Singh(who apparently works in Indian Army) called me at 1107hrs today, and informed me that he wanted to pay via Google Pay, or Phone pe as these are the only methods for online payment in Indian Army. Therefore, we shared our mobile number (9330344232) which was linked with Google pay. Thereafter, Mr. Roshan Singh made a payment of Rs.5(five) via Google pay account in order to check if the payment could be made without trouble.
After that Mr. Roshan Singh initiated payment of Rs.13500(which was selling amount of the port-holes) by sharing a QR code via WhatsApp. Surprisingly, this time Rs. 13500 found to be deducted from my wife, MRS MOUSUMI SAHA’s account(HDFC Bank Acc No. 00281870000583) instead to crediting into it. Mr. Roshan Singh immediately apologized and shared another QR code 22222, and asked me to accept that so that money would be credited to account. Surprisingly, this time too Rs. 22222(Rs. Twenty two thousand two hundred twenty two only) got deducted from the said account. This time he said that our UPI code was punched out of sequence and need to initiate the payment process again using same QR code- which we did. Unfortunately, another Rs.22222(Rs. Twenty two thousand two hundred twenty two only)got deducted from the account.
After that we told him that no more transaction via Google pay would accepted from our end until he returns the money via other methods such as RTGS, NEFT, cheque or cash deposit. Mr. Roshan replied that since he was on duty, he was unable to leave the unit to do that, and he could return the money only via Google pay, Phone pay or paytm. He shared his photo-ID, Aadhaar card and PAN card photo with us via WhatsApp (copy attached), also made a video call to show that he was in uniform and on duty.
Thereafter, he made another transaction of Rs.10 (ten only)to our Google account, we noticed that Rs.10 was deducted from our (above) account and Rs.20(twenty only) got deposited into the account, and according to him, this was method of receiving payment via Google pay, and asked to trust him once more and try with paying Rs.10000(Rs ten thousand only). This time too we followed the same procedure(i.e. scanning QR code etc), and this time too Rs.10000 got deducted from the account.
Soon after, my wife contacted HDFC Bank customer care and got our debit card and savings account blocked to avoid further transaction.
Thereafter, Mr. Roshan Singh and Avdes Kumar contacted me repeatedly showing interest in returning money, but only via Google pay or similar method, and asking us to share friends account Google pay account details. For investigation purpose, we shared my mother-in-law’s account number after reducing the balance to Rs.1000, and shared her debit card details. Mr. Roshan Singh tried to deposit Rs.10000 (Rs.ten thousand only), and asked for OTP. We shared the OTP just to verify his modus operandi- but the transaction got declined, as we did not have Rs. 10000 in her account.
Total amount we are being duped Rs. 67,929(Rs. Sixty-seven thousand nine-twenty nine).

Please look into this issue.

Subir Saha