[Resolved]  Punjab National Bank [PNB] — refund not credited by pnb

I ordered an poco f1 smart phone on amazon on 21st june 2019 of rs 10969
It got cancelled on 26 june 2019 and refund was immediately initiated by amazon with refund reference number
#[protected], i used paytm upi for the transaction so asked paytm for refund status they told me the refund was initiated on 26 june 2019 and credited in your punjab national bank on 28 june 2019, paytm told me that pnb confirmed that refund is credited on 28 june 2019 today is 9 july 2019 still the amount is not credited into my account. I contacted amazon and they told me to file a dispute but when i went to pnb branch they told me there is no thing like dispute, they can't help. I want my refund as soon as possible because its a huge amount for me.
Worst ever service i ever experienced in banking