Did a reset On Apple Watch series 5 and the Apple logo doesn’t disappear?

I think maybe a trip to an apple store maybe required,but try this first;

1. On a computer, go to iCloud.com and sign in with your Apple ID.
2. Go to Find My iPhone.
3. Select All Devices, then click your Apple Watch.
4. Click Erase Apple Watch. Select Next until the device is erased.
5. Click next to your Apple Watch.

This may or may not work,depending on icloud detecting the watch in it's present state.If it works the watch will be restore to factory settings.

What kind of reset,unpair/pair or erase all content and settings or something else?.

Try plugging into iPhone and putting Apple Watch into recovery mode.

I think you need to visit the apple store and they can tell you your options.