Amazon India — non delivery of item ordered not refund of the amount paid from my account

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I placed an order for typecast retro typewriter by we r memory keepers with amazon india and paid rs. 7599.00 through sbi credit card. Order no.[protected]. As per the details the order is supposed to be fulfilled by 456 stores - amazon marketplace. I have received an information from amazon that "456 stores not able to fulfill the the order and the amount will be refunded". Neither amazon nor 456 stores have not made the refund of the amount paid towards the order. I would appreciate if this can be taken up with amazon and its affiliate to get the refund of the amount paid by me. I have recently got re-issued my fresh sbi credit card due to some issues with my previous credit card which i hope not an issue to make the refund of the amount to my account. I have several times written to amazon but no proper response as to when i will receive the refund.
My phone no:[protected]