Bank Of India — I did not get my refund but amazon has already paid the refund

Address:

Patna, Bihar, 800001

Hi..
I ordered a product from amazon and then i went on to cancel it, the amazon team refunded my money but it is yet to arrive in my bank..
I bought the product on 11/10/2018..
I received the confirmation of refund on 14/10/2018
Today is 27/10/2018, it has been more than 12 days but i am yet to receive my refund
My refund reference number = 128258
My bank account number = [protected]
Please make the refund fast..
If in 5 working days i do not get my refund then trust me i'll post thos on facebook and make a video out of it on youtube..!
Bank of india is the slowest bank i have ever used..!