Flipkart — Deactivation of Flipkart Pay Later and Closure of IDFC First Bank

I have activated flipkart pay later, not knowing that flipkart had opened an account in my name at idfc first bank which is affecting my cibil score as it is showing that i have been sanctioned a loan amount of rs. 3000 by idfc first bank. And now i don't have any clue on how to deactivate my pay later. Please help to close the loan account of idbi first loan account and deactivated the flipkart pay later option permanently.