India Post — register post not delivered by postman

Address: 202140

Hi, my self rajendra singh, i have file my itr and got aprox 52000 rs as refund from income tax department, that refund is dispatched by registered post from income tax department, my our postman is not performing his duty properly and he has not given that registry (Post) to me and he has send back to income tax department.
I am continue in touch with postman (Mr ramesh sharma) but he has return my post intentionally,

I am paying tax to govermant but due to some goverment emply, kindly help me on this and take action against this postman.

Regards
Rajendra singh s/o onkar singh
Vill + post - majupur
Dist aligarh (Up)
Pin 202140
Mob [protected], [protected]