Indian Army — Cheating money by Posting a AD in OLX

A person named Laksmi Narayanan stated that he is from Indian army . This person had updated an add in olx for selling his Tv, Ac, Mattress and said would transport the car through army courier service and took money[protected] Advance 9500 P/O and 9000+500 and 10500) from us, now ge is telling that he has cancelled the courier and resufing to give back our money.. I fell that this person does not belong to army and is misusing the other persons army id. I have some proof (Army ID card and Grocery card)which he has sent to me. And the another person named Suresh chandran
Number : [protected]
Ifsc code : CNRB0007421
Account number : Canara Bank[protected]