Bank Of India — Amount transferred to wrong account

A transaction of Rs 50k from a sbi a/c through gpay was made on 10th march to an a/c no [protected] of Md. Ali.
Due to error in typing the a/c no, the money got sent to the wrong a/c no. Which is [protected](Balaghat, MP branch).
We have freezed our amount with the help of the bank bt we are not able to retrieve our money back. We have submitted the Indemnity letter to our Sbi bank and they have send email to the bank of India (Rafiganj, Bihar branch) many a times but they have not responded to a single email.
We have also send email to the Balaghat branch but they have also not responded to our email and also tried calling on the land line number but the line doesn't connect.
We have done everything possible but to no avail.
PLEASE HELP.