HDB Financial Services — I paid extra month EMI interest because of bank sent wrong pre-closing loan percentage

Hi Team,
I have raised pre-closure loan request on 11th feb 2023, they sent approval on 28th Feb 2023 with pre-closure charges percentage is @4.72% as per agreement, if customer pays 36 EMI's it suppose to 2%. I have raised same to customer care. I have already paid 39 EMI's by that time.

They sent revised pre-closure letter to my whatsapp with 2% after paying the 40th EMI(5th March 2023). I raised request to customer care because each EMI contains the capatial+interest because of HDB bank sent wrong pre-closure charges it went delayed.
I have requested the customer care to reversal of my pre-closure charges but they are saying sorry for the inconvenience we cant reversal the amount.

Please find the attached mail proofs.

Regars,
Sunil Kumar