Amazon India — delivery and refund is not received from amazon

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Amazon India

I ordered a product in amazon, the expected delivery date is 7days after the date of ordered, after 7days i can't receive my order, so i wait for more than 5 days there is no response from amazon and seller and no updates about order the so i return that product, there is the return option is not available, simply fake amazon customer service, since my refund also not credited