I got a Razer BlackShark V2 but I threw away all the 7.1 surround activation codes without realizing.

I got a Razer BlackShark V2 but I threw away all the 7.1 surround activation codes without realizing that I needed them to activate it. I believe I should also have THX spacial audio ( I’m not sure about that though ). Recently I have found a single 7.1 surround sound card laying around but when I tried to scratch the stuff off it also ripped the actual code off. I think I got the headset off of amazon and I have proof that I have the headset and the ripped code. I was wondering if there was ANY other way to get my 7.1 surround sound back.