India Post — MIS interest and principal is not being paid by the post master, Ultadanda Main Road Post office,Calcutta-67

Address:	700067
Website:	No wave site for the post office commiting offences

Opened MIS accounts (I)126830(ii)239838 and (iii)239822 with the post master, Gr-I o[censored]ltadanga Main Road post office, Kolkata-700067. He has stopped giving monthly interest and stopped paying me the Principal. Kindly help me recovering my dues and the expenses of litigation if any and interest thereof.