Amazon India — Refund regarding from Amazon 92

I have cancelled a order on amezon on 08 Jan 2021 of Rs 11999. Amezon processed a refund and said that it will be credited in my PNB account by 10 Jan 2021. On 18 Jan 2021 i raised the issue of not getting refund on Amazon app. The amezon provided me refund number-74332741010100970638929 and said to contact my branch. i contacted my branch they said that nothing can be done from their side and asked me to contact Amazon. On contacting with amezon they said to contact the branch with the same reference number. My refund is still not credited in my account. Please resolve my issue.