Amazon India — charge dispute money not refunded

I bought a laptop from amazon. It was defective. So i asked for replacement from amazon. Amazon told that there was no other laptops left in their stock so they initiated the return. And told me that they will refund the amount in my account. It is visible on amazon's refund status that refund was initiated on 22 may 2019 but bank account is credited with no refund amount yet. The name of the bank is "almora zila sarkaari cooperative bank" colaborated with "yes bank".