Hey man, did you find any resolution for this? I didn't find any option for this on the LIC portal. I've raised a grievance complain asking them to cancel the E-Mandate from my LIC account and got a ticket assigned to it. I want to make payments via credit card and hence want to cancel the the ECS/ NACH E-mandate completely. My payment is due in 17 days. Let's see what response I get from them. My last option will be to cancel the E-mandate from my net banking of the concerned bank. Please let me know if something worked for you.
@KingAAR