State Bank Of India [SBI] — my amazon refund amount is not credited in my account

Address:

Nadia, West Bengal, 741250

I had purchased a skybags school bag from amazon online shopping on 7 september 2019 and then i return and refund it on 9 september 2019. Few days later on 16 september 2019 a mail had come, which says that refund is done by a referral code but the amount is not credited in my bank account. So i think the amount is on a pending queue so please you kindly put your attention on that issue. It will be very helpful for me.