ICICI Bank — automatically number update from their system

Address:

Nalbari, Assam, 781335

Dear sir,
Its almost 6-7 months i opened the account.
And till date i dint got the solution.
I gave the number 97xxxxxxxx1 for account, but its was linked to my old account, then bank people told to change the number it will be solved, then i gave another number its activated but the issue is all my transaction details come to new number and otp comes to another number.
What the mess i dont understand. And till date is not solved.

Another issue. I opened my son's account at icici got instant kit.
Acount is running. Got verification for mobile number also, but while internet login showing mobile number not registered.
If mobile number is not registered how can i get messages.
And if its registered then what the use of insaant kit, if it doesnt work.
The worst technology and service i got from icici bank from other banks.
Never got these fullish kind of service that number is linked with old account number.
That means people can never change mobile number.
What the use of providing mobile number in application form if it automatically takes from icici system???