Bajaj Finserv — Ecom CPP telebinding rural extended warranty

I brought mobile phone on flipkart via Bajaj emj card. Now they intentionally put extended warranty loan named 'Ecom CPP telebinding' which costs 1924 rupees. I didn't signup for this and i didn't receive any intimation message or email or call regarding this. This is totally done without my consent and i didn't know about this. Now in email response they say the 'free look period of 15 days is over'. How do i cancel this within 15 days of purchase if i had no idea of this at all. Loan number 6J4ETRGO634829, please take necessary action