ICICI Bank — Account closed without customer consent

I have worked with lehmanbrothers India Ltd in Mumbai in 2006, before moving to TCS london on deputation after 5-7 years, want to use my current account associated with the ICICI bank as i have used same service provider ICICI bank for Lehman brothers and same ICICI NRI/NRE account for salary savings account/ joint account, demat trading account, where verified to update the contact details it has been found the icici bank accoutn has been closed rather it should be dormant and can be re-instated on request. as being previlige banker they seems to be some third party service providers has been assigned and fudged as relationship mangers and denying request to re-open the account even if tis closed. Not sure what is the issue in re-opeing account and how they can close the account without customer consent Not sure if new Banking guidelines has been suggested in such perspective.

ThankYou,
BhanuPrasad YB