Asus India — asus back to school warranty certificate not received

Address: Mumbai City, Maharashtra, 410210

Sir i have purchased an asus laptop from Amazon on 5th may 2019 and registered for asus "back to school" offer in which they are supposed to send extra 3 year warranty card within 20 working days after payment. Now its been more than a month after the payment and till now i have not received any updates on the offer. This is the worst customer service. No reply of the status. They have written they will reply about claims in 45 days and till now no reply.
My ticket number- ASUS143948
Payment had been made to - Kestone integrated marketing services pvt ltd
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