Amazon India — Cash back not received on amazon

Hi Team,
I have placed an order for amazon prime membereship with orderID "[protected]".
On that order, I am supposed to received a cash back of Rs 250 rupees as amazonpay rewards, but has not received yet.
Trying to connect with amazon customer care for couple of weeks, but no solution from their end. They have created 2 tickets, but no luck
Amazon is harrasing it's customers now a days.

Attching the screen-shot of the reward i have collected