Union Bank Of India — Not provide proper information

Address: Ghazipur, Uttar Pradesh

My Mother have pension bank account in Union bank of india village- Khalishpur Dist- Ghazipur(UP).From last 3 month my mother was suffering for own pension work because bank manger not provide correct information. she is not able to travel and bank manger not gives exact information at the time.
Her pension comes 1st of the month but when she goes to the bank he says that your account is not active and now your pension comes next month. 15 days back she visited in bank twice but he did not say anything about her account activation, even he checked account in front of her.

This things is not happen a first time they are always try to avoid the work even I visited in that branch. my mother eye operation are pending just because of pension work..

Now please suggest me how to take the action against him?.

mail id : cp.[protected]@gmail.com
mob no . [protected]