Indian Bank — Excess interest charged

Address:

Main road kokrajhar

A/c no :- [protected], IFSC code :- IDIB000T596, bank name :- indian bank
In the month of march, 2022 rate of interest is excess chaged to 13.5% instead of 9.05%, which effect the interest amount in March 2022
I have requested my home branch(titaguri branch, kokrajhar, Assam) regarding reversal of excess interest but they said it is system generated it is not in my hand to rectify the interest amount . further, I request home branch what is the solution regarding this, they said give me the bank statement and handwritten application withthis I mailed to zonal office, Guwahati but no response from zonal office also.then I personally visit on 6/05/2022 at zonal office, Guwahati regarding interest they said kindly give me 1-2 working days I would talk your home branch regarding your issue after that your issue will solve but still no call and msg .still issue pending