Go to Contact Microsoft Support and sign in with your Microsoft account
Type "Customer Support" and select Get help
Scroll down and choose Contact support
Under Products and services, select Surface
Under Category, choose your Surface model, then select Confirm
Pick your preferred option:
Chat with a support agent
Visit:
https://vsa.services.microsoft.com/en-us/v1.0/
Select: If you’d like to speak to a human agent, let me know at any time.
Send a direct message to @MicrosoftHelps. Their social support team is surprisingly responsive and can open tickets on your behalf. Briefly describe: device returned without Type Cover and Pen after service.