Canara Bank — Refund Not Showing In Canara Bank Account

In november 2020 I purchased a product from Flipkart and returned it as it was not working. The seller had processed the refund of Rs. 635/- to my account on 15 Jan 21, 04:21 PM & it should have been credited by 25 Jan 21, 04:21 PM. The refund reference number is 17203011019102789574695. But still I did not receive my refund. I visited the Branch where my account is but I did not receive any help from them. They say its not their fault and should raise a complaint on flipkart. But flipkart had already had processed refund and gave the reference number for the transaction. Please resolve this issue.