State Bank Of India — Pension transfer delayed

Address:

Patna, Bihar

My grandfather was a pensioner, he got passed on 01 dec 2013.We had given information in bank regarding this and submitted all documents to transfer the pension to my grandmother.It has been 1 year 2 months passed away.Everytime when we try to take information regarding this bank official always say we have done your work sent your documents to treasury office.But when we went to treasury office they denied any document to receive.
My grandfather was in forest department, pension used to be given by sbi, munger