Amazon tweeted about the recent technical glitch during the Yureka sales on 13th Jan 2015. There were many users who complained that they were charged or their cart showed the Yureka with a price tag of Rs. 12,499 instead of Rs. 8,999.
Amazon Tweeted and have apologized regarding this incident. They mentioned that they are actively working with the seller to resolve this issue. It was a technical glitch that showed up the price of Rs. 12,499 for a brief period instead of Rs. 8,999.
If you were lucky to get the Yureka but were charged Rs. 12,499 you can check with Amazon, they will issue a refund for the extra amount. The Yureka went on sales on 13th and was out of stock withing seconds. Amazon had about 10,000 units for sales.