razer kraken tournement edition scrach card

day before yesterday i brought a brand new razer kraken tournement edition. and it came with a 7.1 surround activation code card.. but when i scrath the card the. code so got scarthed off... soo i couldnt use it. then i foumd out that there is a way to request a new code with the serial number.. but when i tried that with the correct s/n it says this product is not applicable to have it. then why did i recieve a scratch card? please help me with this situtation