Haptik App – Get 20% Cashback on Paying via Amazon Pay Balance. Haptik has come up in association with Amazon and offering Flat 20% Cashback upto Rs 75 on Paying via Amazon Pay. This Offer is valid from 13th April to 30th April 2018. Offer valid for once per user and Maximum Cashback is Rs 75. So Hurry up and avail this offer !!