Indian Army — Person claiming to be an Army Official

A person called Manjeet Singh contacted me on Facebook to buy some Rakhis that I had posted to sell. He claimed to be from the Indian Army. When I asked for his address he said he is posted in Shivaji Chhatrapati Airport, Mumbai. He said he will give the payment when taking delivery of goods. When I told him he has given an incomplete/fake address he started abusing me. After I disconnected his calls he kept calling me again and started abusing me. Want some action taken as he does not seem to be an Army personnel.