Amazon India — product picked up by amazon agent but did not get refund

Address:

New Delhi, Delhi, 110089

I returned 3 items of the same order on 22nd October because one of the pearl was broken and when I asked for the return receipt, the guy said that they dont give receipt but I will get a message for return received within few minutes. After 5-10 minutes I got the message that my return pickup has been cancelled. I called amazon customer care right away and the Cce told me that once I have returned the item, they will handle it and that message can be a technicle issue.
So he assured me that amazon will take care of this now and I will definitely get the refund. I didnt get my refund till Today, 18th December, inspite of making unlimited calls. This is a fraud. We as customers trust Amazon and its not our fault if your courier guys cheat and are thief. I need my money back.