Sorry to hear you are unable to see your files in XD. Would you mind checking if you're logged in with the enterprise ID with company account? For immediate assistance, you may create a case, start a chat, or manage an existing case from the Admin Console's support tab if you're a System or Support administrator using this link: https://helpx.adobe.com/contact/enterprise-support.cc.html
If not, then contact your admin and ask them to create a case or start chat thru the admin console.
how can i start a chat with customer support?
How do I know who's the enterprise admin of my company?
You can find your admin information using this link: https://helpx.adobe.com/in/enterprise/kb/contact-administrator.html
Please check and ask them to create a ticket for you.
Let me know if you need further assistance. I will try my best to help.