This has been extensively answered on this forum and a search will bring up many questions with answers
As its something that's been massively publicised everywhere, you should have done some research before purchasing. I just purchased another camera and made sure I knew as much as I could before spending over a thousand pounds.
Same goes with phones, they cost a lot of money and knowing about something before parting with any money is important
As for a refund, this is upto the retailer you purchased from.