Bharat Sanchar Nigam Limited has a self care portal on their website which provides services for both unregistered and registered users.

ICICI Bank Corporate and Banking Customer Numbers
If you own a business and have a current account for your company with ICICI bank then here are the customer care numbers if you need phone support.

ICICI Bank Customer Care numbers for Wealth and Private
ICICI Bank provides several investment solutions and other wealth management services with a very personalized support through their financial specialists.

ICICI Bank Customer Care Numbers
ICICI Bank has both toll free universal number as well as State or City wise direct number. If you want some quick support then calling on the direct number of the city you live in is the best option.