Hello, We understand how frustrating it can be to set up a device after resetting it. Make sure you are logging in to the Samsung account using the same email address you used previously with the computer, as the Galaxy Book would be registered to that email address. To update the email address associated with your Samsung account, you will need to contact the Accounts Team by calling 1-855-795-0509.
For assistance in troubleshooting SmartThings, please reach out to the SmartThings Team using the following information:
UK support 0333 0000333