Bank Of India — Refund initiated by amazon but still not receive yet

Address:

S/O Dharamveer Singh Yadav Kotla Mohalla SN Road Firozabad 283203, Popular Glass ke pass

I have ordered a product that was a book of Rajasthan police constable exam on 9/1/2022. The payment method was pay on delivery amount was 275.00 rs. I get that book on 14/1/2022 but after a while i was not able to understand it so. On Same date I decide to return it and I apply for refund and added my bank account in amazon for refund. On 4/2/2022 means after 21 days I get my Refund reference number on email by Amazon my Refund reference number is HSBCN[protected]. Now the problem is that the refund initiated by Amazon but not receive in my bank account I have added a screenshot of my Refund reference number emailed to me by Amazon.Please do the needful it's been a month