Indian postal department
Not recevie the post

This is my reg number PL70600392 from bank they have dispatch on 22-6 but still i have not receive and when i called them dey say me that not reflecting in our system and when i ask them from this reg number please say me over phone i will collect it from u but they refuse and cut the phone now say me what can i do please help me out im from chennai please help me out

thanking you