IDBI Bank — Refund initiated by Amazon by still not received

I order
SBA A019 M4 Plus Bluetooth Wireless in 3 qty on 22 nov, 2020 amount of 1408.25 my amazon order no[protected] and after some time I cancelled my order for refund.
But refund not received in my bank
I call amazon customer care and ask how much time taken by you for refund
They said refund initiated by us please contact bank. They give me Refund referendum number[protected], refund reference number is same of my payment transaction id
I call amazon customer care that both transaction number is same how's is possible they said both number are provided by bank so it same may be possible. Kindly request you please do needful to initiated my refund