Amazon India — Charge dispute of Rs.9,999

Address:

Ghatsila, Jharkhand

The refund was initiated by Amazon.in on my SBI Bank account of card number [protected] of account name Sikha Samantha on 8th July with return reference number ONUS20210709, but it's more than a month still I don't have my refund on my bank account and neither there's any record of such ONU number transaction showing on my bank account as informed by my Bank.
Kindly help me with the refund of Rs. 9, 999