Hi nutts99,
Welcome to Microsoft Community.
It sounds like you received a replacement device that wasn't properly reset before being sent to you.
Since the warranty claim portal isn’t allowing you to select "Device," you’ll need to contact Microsoft Support directly. Explain the situation clearly: The replacement device you received is still configured for a previous business user. You need a properly reset or new replacement device. You can reach Microsoft Support via: Contact Us - Microsoft Support
I hope this helps. If there is anything not clear, please do not hesitate to let me know.
Your Sincerely
Hahn. W - MSFT | Microsoft Community Support Specialist