Canara Bank — Issued refund

I ORDERED A PRODUCT OF AMOUNT 13999 ON FLIPKART 12 NOVEMBER 2020. BUT I HAVE A ISSUE WITH PRODUCT AND RETURN THE PRODUCT ON 13 JANUARY 2021, AND SELLER HAS ISSUE A REFUND OF AMOUNT 13999 ON 13 JANUARY 2021 LAST TIMLINE DATE OF CREDIT THAT AMOUNT WAS 21 JANUARY 2021.
FLIPKART SAID THAT WE HAVE DID THE TRANSACTION TO YOUR BANK ACCOUNT ON 21 JANUARY 2021 ITSELF BUT NOT SHOWING INTO BANK ACCOUNT TILL NOW THAT IS 27 JANUARY 2021.

I contacted my bank customer support. They are not able to locate the refund with these reference numbers.

I contacted bank customer support. They are unable to do anything for this refund. Their customer support service is very poor. So, they advised me to contact the branch. The branch is also unable to help me with the same.
The reference numbers are;
17203011019102789574489