State Bank Of India [SBI] — Payment to wife of deceased account holder

My father kapoor chand gupta was expired on 21.5.2016 and he had a saving account no.[protected], govt.teacher. My mother savitri devi has also saving account in SBI, Brahmbad(Bayana) account no.[protected].She has submitted all the required documents so many times but the bank asks repeated additional documents resulting we are feeling harrasing. It is joke that my mother savitri devi is wife of Late Shri Kapoor Chand Gupta who is also getting family pension but it is beyond understanding that why bank is not transferring the amount in her account even we have submitted all the documents. a period more than 10 months passed but yet formalities are not completed by the bank. Kindly arrange to make payment to her account at the earliest otherwise she has to take shelter of civil court and claim mental and financial loss for which bank shall be responsible.