Amazon India — Refund yet not done in my account

I am not the only one. I could see so many complain related to refund from amazon.
Pnb and Amazon are just fooling me around and wasting my time. My amount of rupees 1297 was refunded to my pnb account on 17th July but could not see any details.
They are not able check through reference no. and refuses to check even most of the time.
Please find my reference no.
75105171198000713860135
75105171193000693321343

It's a humble request help me and provided solutions.