Canara Bank — Interest of SCSS deposit not credited

Address:

South 24 Parganas, West Bengal, 700144

My mother-in-law has deposited four lakh under Senior Citizen Savings Scheme at the Canara Bank Branch, Baruipur (3401) on 17.10.2016 and one and half lakh on 05.11.2016 respectively. The interest was due on 31.12.2016 for both deposits. When I have contacted the Branch Manager, he said that he has nothing to do except forwarding the complaint. He has taken details of the deposits and other relevant information. After that I have the branch several times, but without any solution. Only he says that he has sent the mail and waiting for the reply. The manager is such an irresposible branch head. He only does something when I visit the branch.
In this regard, I want the interest to be credited in bank account at the earliest and I want to transfer the deposit to other bank (Bank of Baroda, Baruipur Branch) so that my mother-in-law gets her due timely.
What will be my next appropriate action?