Hello
Forum/community users and support are not in the same system. Users here are independent, so there's no way for any of us to connect you back to your case.
You need to use the Get Help app to get back to support and provide the case number to them.
However, I am happy to help you with the camera issue if you would like.
If you open the Camera app, what does it say? Any error message? Or is it just a black screen? Any additional information would be helpful if you don't mind.
Most camera issues can be due to a physical privacy cover covering the lens. Make sure that's not the case.
Otherwise there is usually a physical button/key/switch you can use to turn the camera on or off. For example, most Lenovo uses F8 or Fn+F8, or a switch above the lens, HP has a camera key or a button on the side of the laptop, MSI uses F6 or Fn+F6, etc.
If you are not sure, tell me what the camera app says/shows, and then please hold down Windows + R keys, type in msinfo32.exe and hit enter. Then share a screenshot of the System Information window. Thanks!