Indian Bank — Have not received the refund from the Amazon

Address:

Indian Bank,Gandhi nagar, Sathuvachari, Vellore 632009.

I have ordered and received a XP-Pen Deco Fun L Green Graphics Tablet 10 x 6.27 Inch Pen Tablet with 8192 Levels Pressure Sensitivity Battery-Free Stylus, 60 Degrees of tilt Action and Android Support from Amazon on February 2nd, 2022 and paid by cash of Rs.4, 099. Due, to a product missing I have to return and It was returned on February 4, 2022. But, I have not received my refund yet. Amazon says they have initiated by February 4 the refund and gave the Reference number([protected]-The reference number given by Amazon). But, the bank says nothing has credited in my account. I need this to be fixed. Please do consider. Let me know if there is any other details needed.