United Bank Of India [UBI] — refund money from amazon not refunded to my account

Address:

Sikkim Manipal Institute of Technology, 737132

I had done one online shopping (Amazon) of amount 3001 rs during november. Due to some damage i had to return the product. I had requested for the refund of the amount to my ubi account. According to the shopping site the account was to be refunded on 26/11/19 (Refund reference number for the transaction is[protected].) but the amount was not refunded. I again put up a complain (Complaint number is: 1-[protected]). I was told the money will be refunded by 1/01/2020. But it didnot happened. I again put up a complain (Complaint number is: 1-[protected]). I was again told the money will be refunded by 28/01/20. Today is 30/01/20, the money is still not refunded.
I will be highly obliged if you look in the matter and consider it as soon as possible.