Indian Bank — I didn't get my refund amount of 19,499

Address:

Indian bank,pudukadai

I ordered a mobile on amazon at 10/08/2020, then I cancelled that order.They initiate the refund money on that day itself.But, I didnt get the refund money till now.Amazon given a reference num also which sended by Indian bank to them.Amazon customer care respond well instead of Indian bank customer care.I tried to say that reference number to Indian bank customer care but they said to go to bank directly instead of listening this.
This is not the first time, its happening oftenly.
I hope you will provide a better result for this and I will trust to get my refund amount soon.
Thankyou,
Pragatheeswari