Indian Overseas Bank — OTP

Address:

600033

Hi
I guruprasadh customer of west mambalam branch a/c no.[protected] needed one time password to be sent to newly registered mobile number. Though sms alert has been changed but still otp is always received to my old number.
Please change at the earliest.
I have informed many times to the bank by writing letters thrice
I think it would be good if iob impose letter writing on 5th standard students so that they can learn.