Amazon India — amazon india, online shopping - not refunding my money

Address:	600097
Website:	www.amazon.in

I ordered 4 products in Amazon on 10/08/2018. The products are Dove conditioner, Biotique face Wash, Vaseline body lotion and L'oreal Paris night cream. The order number is[protected] and total amount was 868.50. On 16/08/2018 one courier person came for the delivery of my package. My payment mode was pay on cash. So I paid the amount 868.50 using my HDFC debit card. The courier person swiped my card and amount was debited from my account and credited to Amazon Seller, Bangalore. But the courier person told me that the payment was not yet reflecting in the Amazon Payment and so he cannot deliver me the package though the amount was deducted from my account. He told me to call the customer care. I called them instantly when the courier person was there. The customer care representative also told me the same and additionally he told me that to wait for few hours when it will reflect they will again deliver me the package but that time they cannot deliver me the package. I agreed. But they didn't deliver me the package and on 22/08/2018 I got a mail that the package is returned to the Amazon fulfilment centre and I will get my refund. Since then today is 14/09/2018 they didn't refund me my money too.
I have send them several mails, called them several times every time they are telling to wait either 3-5 business days or 24-48 hours. But the problem is not solved yet. They are not refunding my money.