Bandhan Bank Of India — Refund is initiated by Amazon but did not receive

I have ordered the Boat Xtend Smartwatch on 21 September through Amazon and cancelled on 23 September. The price is 3499 rupees.The date of refund was 28 to 30 September. The refund is already initiated by Amazon but still I did not received the refund.
My order ID is[protected]
And the reference number from Amazon is 30005412671264024250416.