Union Bank Of India — amazon refund money

Address:	Salt lake city, sector 1, Kolkata, West Bengal
Website:	Google

I am rajat halder. I ordered a waist coat set worth rs 699 from amazon on september 16th 2019. But my product was defected. So i return this product on 17 september. 2019. I claimed for refund to amazon. So amazon send me a massage for initiating refund that they had initiated my refund on[protected]. But yet i did not get any massage from my bank that for any transition for rs 699. I called to amazon and they provide me a reference no. 0p1jdl3q0000k0m43zvl for my transaction. I called to my bank union bank of india. They said there is no transaction of that day. After that i called again and they said that they are already paid this amount to my bank. Pl see my problem.
My amount is 699/-, my name is rajat halder, my a/c no is [protected]. My ph no. Is [protected].
Pl help me to credit my refund rs 699 in my account. Pl file charge dispute. Kindly help.