Indian Army — fraud on mobile

Address:	Hyderabad, Andhra Pradesh, 500013
Website:	Olx

Today I have seen a mobile in olx going to be sell by Vikas patel, He told that he will send the mobile of 12500 rupees via army courier facility and would be delivered within 6 hours and given a Google pay number[protected] and told to transfer 3000/- and then said that the remaining amount should be given to courier boy but within no time courier man calling me that "I'm near ur home;Please clear the due".I am being doubtful whether to pay or no.How could I do with this people.I knew army people are punctual and have clear list of rules but now they are been changing the rules.whta to do .I want to cancel my order but they are not willing.I need refund of 3000/-.Please help me.