Canara Bank — changing mobile number / internet mobile banking

Sir, i am atanu ghosh from cuttack, odisha. I have an a/c in c. D. A, cuttack branch of canara bank. More than five times i have given all documents to bank for changing mobile number, but unfortunately the officer don't able to change my mobile number from old to new. Atlast he refused to do this.
The main problem i face during online transactions is that the otp number is coming to my old number & the transaction details or available balance shown in my new number. I want to change my mobile number sothat i can get the otp & transaction details together in my new number.
I kindly request you to check out my problems as soon as possible so that i shall remain greatful to you.