Asus India — Warranty extended promo offer rejected

Hi,
I registered on https://www.asuspromo.in/ to avail extended warranty for my newly purchased ASUS gaming laptop within their offer period. This request was rejected, stating the registration was not done in 15 days from the date of invoice. Upon this, I had called ASUS promo support on 27th AUG, and told them I did my registration on 24th Aug i.e. 15th day from my date of invoice i.e. 9th AUG, and also told them my delivery was delayed (done on 14th AUG) and so I received the invoice later. They said to send me the delivery proofs of Flipkart which I emailed them at [protected]@asuspromo.in for considering the same. So inspite of registering on their website as per T&C as well as providing delivery proofs they are still rejecting the offer.

Ticket Details: GMB-218538

Support Ticket : 94009