my apple watch 3 is not showin my contacts and im not getting notificatons

• Forced reset the watch. Simply press and hold the Digital Crown and Side Button (together, about 10 seconds) until the Apple logo appears, then release the buttons and let the watch restart.
• Go to the Watch app, My Watch/General/Reset/Reset Sync Data and force it to reload the missing data from your iPhone.

That’s odd, the sync reset used to work. I just tried it on my equipment, the Reset Sync option saw my tap and sort of blinked briefly when it was tapped but I’m not sure it did anything useful. Without broken data which might be fixed to see a difference it would be difficult for me to know anyway...

I think at this stage if it is still not working correctly you would be justified to consider the big stick, and try unpairing then re-pair the watch. Unfortunately this is a little more time consuming than previous efforts. If a re-pair doesn’t help Contact Support to see if Apple’s paid support techs have any good ideas.