Recently bought a windows key from Kinguin for Windows 10 Pro. After installing Windows into my new PC I plugged in the product key and it didn't work. I talked to customer service from Kinguin but it was clear he didn't speak English as his primary language so it created a small language barrier between us. I was "told" to click "Don't have a product key" and to click Windows 10 Pro from there... After that, I found a way to insert my key after but it said I required the internet so after a couple hours I got the internet running to my PC and then it said my key was used. I was sure maybe it automatically used the key I put in but it says "We can't activate Windows on this device because you don't have a valid digital license or product key" Can I get some help for what to do next? (Starting to think buying from Kinguin was a bad idea.)