Amazon India — order cancelled by seller after the full payment and the same product in listed with higher price.

Address:

Nagpur, Maharashtra, 440027

I had ordered ticwatch 2 smart watch, 2 quantities and paid the full amount as requested on amazon application but the order was cancelled by seller after 6-7 hours of placing the order.
I had inquired about cancelling the order to amazon then they replied me that the product was out of stock after the placement of order but the same product is available on site from same seller by higher price. after that amazon is not taking responsibility about the issue and saying to contact the seller.
I have contacted the seller by mail but there is no reply from seller as well as amazon.