Akosha.com — flipkart cashback not paid

Website:

Flipkart.in

I purchased a phone on flipkart in november in which i was supposed to get cashback on payment made by debit card. There was nowhere mentioned in the terms that i'll get the cashback on 29th feb 2020 as it was instant cashback offer. Well i contacted customer care services many times and i contacted them again after 29th feb but it's 21st march today and i still haven't received the cashback. This is very frustrating. How can we trust what they offer. I've lost my faith in flipkart. Everyone doesn't have time and efforts to do what i'm doing. I'm sure they fool thousands of their customers with such act.