Versa 4 won't sync anymore

[Halohalo]

After not being able to sync my Versa 4 since August 8, I have tried (almost) everything I could fing in the manual and on the forum. I deleted and re installed the app, deleted my old charge 2, set my Versa 4 to factory settings and now when I try to connect it to the app the 4 digit pairing code isn't on my watch. I tried a zillion times but no luck. Please help! Thanks

Moderator Edit: Clarified subject

[Guy_]

Hi @Halohalo - in case you have tried

try Logout of the Fitbit App and swipe off the active window and in Android clear the storage cache and force stop it and then restart the phone.

Make sure there are no other devices running the Fitbit App switched on.

Restart the watch by holding the button for 10 seconds till it vibrates and the logo appears and wait for it to start.

Login and  click profile photo and "+Set up a Device"

If this doesn't work remove the watch Bluetooth entries from the phone and try toggling Bluetooth off/on and try again. Note you can't pair your watch in Bluetooth, the app has to do it.

[Halohalo]

Thanks for the answer, sadly it didn't work. I did all these steps a few times before, except for clearing cache. 
It's gotten even worse, the settings option on my Fitbit (the anvil icon is blurred) doesn't work anymore and I only have the clock face and the Weather, all the others (heart beat, steps, etc) are gone. 

[Guy_]

@Halohalo - it's possible the factory reset didn't work, or the watch has a fault.

Perhaps you can chat via the Fitbit App, click profile photo, Help & support, Contact Customer support, to get them to check it.

In any case it is under warranty.

[Halohalo]

Thanks again, I took it back to the store where I bought it, they checked my Versa 4 and they believe it's a software problem. So they will send it up to get it fixed. Fingers crossed!