Registering Headset for 7.1 surround sound activation without proof of purchase

Hello, I bought a Kraken 3x about a year or two ago for my wife. Think I might have bought it from Walmart or another brick and mortar store. I have already thrown away the box and the receipt. I don’t care about the warranty, just need the surround sound. I have the serial number, just no exact date of purchase or proof of purchase. Is there anything we can do to get that code to activate surround sound please?