Amazon India - Parcel not delivered

I have ordered a Microphone Vodool E*** wired handheld cardioid condenser with *.* mm order date is *july ****.I have already pay the amount through my debit card. My order Id is ***-*******-******. Shipping address is - Jonaki Kareng, Dighala gaon, ******,Dibrugarh, Assam . The delivery boy has called me **th July but I was unable to receive the item. So I told him to return the parcel.
I thought they will refund me. But they don't refund my amount. Finally I call Amazon customer care office ** August ****. They told me that they have solv my problem through contact Currier partner. But Currier service has send me the Delivery receipt where I found my fake signature. The date of fake delivery is ** July ****.