Hello, I bought a blackshark v2 x headset. Inside the box, there was a card to activate the 7.1 sound. There was no code on it and only a QR code on it, so I could not activate this option. I entered the S/N and P/N on the website to get the activation code, and I got the message that this product is already registered. Can you help me?Sorry for the bad language, I use google translator
p/n:RZ04-03240100-R3M1
S/N:HN2121d13401568

Purchase receipt in Farsi language