Hi,
As this is a public community forum, we cannot access or retrieve your product key. For your security, please do not share any personal information or product key details publicly.
Did you purchase the product key from a third party seller? If so, I recommend contacting the seller and explaining that the code was damaged when you scratched off the protective coating. Provide your proof of purchase and, if requested, a photo of the damaged card.
The seller may have a record of the product key associated with your purchase and can check whether a replacement is possible. They may also have a direct contact with Microsoft's sales or distributor support team to help verify the purchase and determine whether the damaged key can be recovered or replaced.