Myntra.com — unauthorised payment of products

On the 19th august i received a call from a man claiming to be calling from amazon, the online shopping company. I had recently made an order with amazon and the man explained that amazon was having problems with using their international couriers. As a result he told me that my order would not be delivered and that i would receive a refund.
The man had already mentioned my name, details of my order so i was mostly sure that it was a genuine call from amazon. He asked me to put 1 usd into my credit account and provide my card details to him. I then started to receive authorisation codes which happened 5 times. The reason it happened consecutively was because each time i provided the codes to the man he told me that there were problems getting the codes to work. I also received a text message notifying me that i had paid for a ‘citrus p myntra’ item. There was a text with both its indian and hong kong currency value. I asked the man the reason the text messages contained indian currency with the codes and he replied that it was just the equivalent cost from my amazon order which was completely untrue. The call ended with me telling him that i would notify my bank about the suspecting text messages.
I have so far cancelled my previous credit card account but am left with this outstanding bill which i didn’t order from. I hope you can provide any help regards to this incident. I live in hong kong and can be reached here: [protected]@gmail.com.