Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
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When you apply too much pressure while scratching the silver or grey-coated area where the product key is located, it might damage the sticker and make the text unreadable. Use a magnifying glass to see if you're able to read the characters and use them to activate the product.
If you're unable to read the key, the first step is to contact the seller who sold you the product and see if they can offer a return or replacement for the item you purchased.
If they refuse to replace the item, you’ll need to get in touch with a Microsoft Office 365 support advocate directly. You can use the Get Help app on Windows or visit the link below to connect with Microsoft Support:
https://support.microsoft.com/contactus/
Select Office as your product, then sign in with your Microsoft account to connect with a live support agent.
Let me know if you still need more help.