blackshark v2x refund after activation 7.1

So I bought a blackshark v2x without the USB. I used it for a while, added it to my razer id and used the code to activate 7.1 (it came to my email). But as it turned out, I have problems with the mini-jacks on the motherboard and needed the USB version. I went to the store to return them. While the salesman checked the package, he asked about QR and 7.1, and I told him the truth. He ended up sending me home. What to do? ) Can I go to another distributor store and lie that I didn't do anything, or can the raiser cancel the activation and remove them from my id?