State Bank Of India [SBI] — Non issue of acknowledgment receipt against death claim application submitted

Address: Bangalore, Karnataka, 560027

Hello,
Submitted death claim application to sbm/sbi, 8th cross, wilson garden, bangalore.
Chief manager received the application along with the original death certificate, passbook& fd aling with xerox of mentioned supporting documents. She decline to give acknowledgment for the same. This is the 5th time, we are visiting the bank. Is shortage of staff, our mistake?
She has informed us that she will checked the documents whenever she can then informed us if any other document is required after 10days.
How should we approach, can't bank staff show little concern at least in death claim cases. Each time, making my mother travel is really painful during this time.
Regards,
Kavitha