Watch isn’t working properly.

Hi lilliana147,

Welcome to the Apple Community.

It seems the update had not completed, as the Apple logo was appearing and disappearing. This may often seen on devices during updates, before the update completes.

(For convenience, It is often a good idea to leave watch updating overnight.)

You might want to see if this Apple Support article(link below) helps:

Update your Apple Watch – Apple Support

Eg: says:

"Leave your Apple Watch on its charger while the update completes.

Don't restart your iPhone or Apple Watch, and don't quit the Apple Watch app.

When the update is complete, your Apple Watch will restart on its own".

Else:

If you need more help:

You might want to reach out to the Apple Watch Support Team.

There is a "Get Support" link (scroll to the very bottom) on their webpage (link below)

Apple Watch - Official Apple Support

All the best :-)

Sorry you haven't been able to complete the update,

or

to do a forced restart,

or

to contact Apple Support.

You might want to try phoning Apple Support, if the link provided hasn't worked for you:

See a list of Apple phone numbers around the world

Contact Apple for support and service – Apple Support

Other options for obtaining support from Apple:

https://twitter.com/applesupport

Genius Bar Reservation and Apple Support Options - Apple