India Post — Not delivery in my letter

Address: 500058

Hi sir my name mohan i have work in brahmos .My ungle letter send in 08/02/2017 in colachel tamil nadu .Post person is not com in my area. Area in hydera bad 500058 i asked post office but person is you go in your near post office you ask them .I will ask post office you tell other post office but not currect answer in post office persons .Leteer not deliverd.