ICICI Bank — Regarding changing my email address

My name is shashank Shekhar, i have credit card of icici bank, i have given my official email address at the time of application but now i have left that company till now also all notifications are going on my official mail which is [protected]@baldealer.com, i have tried to change it online but unable to do. I have tried i mobile also but there also it doesn't work, i have called customer care also lota of time but though also nothing happened..
It is requested to remove my official email address which is [protected]@baldealer.com and add my personal email address which is [protected]@GMAIL.COM.
Kindly do the needful soon as possible.

Regards
Shashank Shekhar
[protected]