Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
The 'TokenStateScrapped' error indicates the product key is not recognized by the activation servers, either the seller has not registered that sale or the key they sold you is invalid, I did check that website you listed and honestly, some of the Office licenses they are selling do not look correct.
You will need to contact Microsoft support directly, provide them with proof of purchase and the details on that code card to see if they can check that licence and if possible register that code for you, try using this method to contact their support.
Go to this link: https://support.microsoft.com/contactus
Select Microsoft 365
Click 'Get Home Support'.
In the box provided, type billing.
Press Enter, then on the next page, scroll down and click 'Sign in to Contact Support'.
Navigate to Microsoft 365 and Office - Manage my Subscription.
Select the 'Chat with support agent in web browser' option