Ajio — Did not receive benefits as per offer

Hi, during the Ajio sale, i had placed order for amount more than 7, 000/-. There was an offer that if you place order more than 7, 000 you will receive benefits worth 18, 000. The benefit was in form of coupons and products. It has been more than 20 days i placed order i did not receive any benefit. I tried reaching their customer care but no resolution. I tried to escalate but no resolution. They are doing fraud by not giving benefits to customers