Indian Bank — I m complaining about my refund not processed

I was ordered items worth rs. 614/- on amazon online shopping using my indian bank atm card on 13th may 2020.. After few minutes i was cancelled my order. On that same day i got an email from amazon that was your refund has been initiated it will be on your account 2-3 working days. Reference number is #158580. Today date is 1st june 2020. Still i didn't received my refund from indian bank. I was called indian bank customer care they are not responding correctly. Please make my refund as soon as possible.