India Post — Public provident fund - closure/premature closure of account at head post office

Address: Dhanbad, Jharkhand, 831015

Hello sir i need your attention please there is a big issue my account did not get last year interest also this year a big difference in interest plz check from your end.
I had opening a ppf account (A/c no:-[protected]) through telco works s. O on the year 2012. But pass book is updated on 12.08.2015 & interest missing of financial year[protected] approx 28762/- rs.