Amazon India — not got instant discount on amazon.in using indusiand bank credit card emis

Address:

Sonesta Residency, 7th Cross, 560075

Order date-20-aug-2019
Order #[protected]
Order total-23, 106.01 (1 item)

As promised by amazon.in of 20 aug, instant discount of 10% using indusiand bank credit card emi transaction.
I applied my indusland bank credit card to avail that discount but didn't see discount amount.
I called customer care on same day (20-aug)
And they told i can go ahead and order, post 3-4 hours i will be getting my discount amount.
I did same and not got till now.
It's been 11 days to follow with amazon but solution provided yet.
They always says you were eligible of this discount so you should get but further that no update until i reach them again.