India Post — postman denied to give my pan card

Address:

Bakraur Post Office, 824231

Respected Sir,
I Shashi Shekhar Sharma from village Bakraur, police station Bodhgaya, district Gaya, 824231, Bihar, recently got a call from the postman regarding my pan card.
A postman named 'Ishwar' living in Bakraur village denied to deliver my pan card on the mentioned Permanent address. Since I was out of City so I told my younger brother to go to him and collect my pan card but postman refused to give him my pan card and he again called me and told me that I am not going to get my pan card without offering him kharcha pani(money). On this I told him that I am going to make a complaint against him. He told me"nothing will happen to me". His mob no. is [protected]. Going to complain against him on official website of India post also...Thanks.