Flipkart — Price of the product was more than the mrp of the product

Address:	Bangalore Urban, Karnataka, 302033
Website:	www.flipkart.com

I recently purchased a book from flipkart. The price shown there was rs. 544 with free home delivery. I paid money through my debit card.
When i recieved the book i checked the printed mrp on the book, that was rs. 475. I was really shocked!
At the opening page of the book where usually mrp is printed, that place was coloured by black marker to fool the customers. But mrp was also printed at the end of the book.
It means they have charged me rs. 69 more on this product.
This is rediculous. So i contacted flipkart customer support and i told them about the problem but they said that this type of problem should not be there or any other charges might be included in the product. But there was no any other charges or taxes or delivery charge on this product. But they kept on making excuses. Finally they said that they are transferring my request to thier senior executives so i have to wait for 24 hrs for the problem to be solved. But i haven't received any response from them in next 48 hrs. So i again contacted them and they again made same excuses.
Lot of my time wasted in contactng them but my problem is not solved. I am frustrated now.

How can they charged more money than the mrp of the product. I am attaching a soft copy of the invoice.
I want justice. I want a strict action and penalty against flipkart so that they can never fool any more customers.