I had booked double prepaid order for same product mistakenly however i cancelled one o...

I had booked double prepaid order for same product mistakenly however i cancelled one order instantly after sometime i got mail that my refund for the prepared cancelled order had been processed on the same date i had ordered the product on **-**-****. Mail from the Amazon india got refund reference number ****** and it says that my refund will be credit in my account after * working days. Even though i didn't get any refund after ** , complaint amazon india about my refund which i had not got still it had been ** days. They just said it's from bank's side , bank will credit your refund , as amazon india already initiated refund for my bank account, amazon have nothing to do with this concern. Bank said they had not received any refund, the refund reference number sent by the Amazon india is not UTR or transaction number so bank can't trace my refund. I am frustrated now it's been approximately one month. I had filed charge dispute with sbi card. They said it's just for credit card transaction only. Please guide me and help me out.