Sorround 7.1

I had my razer krakens for a while now and i just found out they support 7.1 audio. I went thru and registered them on my account but havent receved key for activating 7.1 audio. From what ive seen you will need my Serial number Model number: RZ04-0283 S/N: 861940D09801421 Hope someone can help me with this as im starting to go blind from reading all threads here and on reddit. Greetings from Montenegro :)