Xiaomi India — mi earphones coupon

I redeemed my coins yesterday and i still didn't receive my coupon for mi earphones. Please send the coupon code as soon as possible. I havent received any coupon yet. So go through my complaint and send it.... I still didn't received my coupon code.... I redeemed my coins two days ago... But the coupon isn't credited in my mi account... When will i get the coupon code...