Windows not activeted

Windows 10 Home is not activated on my new tablet Ubook.
How can I activate Windows 10 Home on my new tablet,
Chuwi support is not responding?

This does not work.
Windows is not activated!

If you get any error code, check what it means.

There is also a possibility that your system files are damaged and you need to restore the system (settings=>update & security=>recovery=>reset this pc) or reinstall.

Error code 0xC004C008.

If Activation troubleshooter doesn’t work try to do this:

run command prompt as administrator,
enter slmgr.vbs -ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx (replace xxxxx with your product key)
then enter slmgr.vbs -ato
and then enter slui 4 (this will start activation by phone again).

If this does not help, then most likely you will have to wait for a response from