Cancelled confirmed order because price was increased

Amazon India is cheating us by selling products on deals and later on canceling the order without informing the customer. Today i ordered micromax A190 mobile phone from amazon and paid in full. The order was confirmed but after 4 hours the order got cancelled and refund was initiated without any reason. When I called the customer care to confirm the status I got to know that the price of the product is increased now and amazon cannot fulfill the commitment of delivering the order at agreed price. Now if I need the same product I have to pay the increased price. This is not what we expect from a company like Amazon. Please do not get trapped by deals it is just to make you fool. My confirmed order number was 404-6625312-9276330.