Notifications not working Charge 5

[Karinetoutou]

Hello, I have a brand new Charge 5 bracelet.
The day I received it, I managed to set up all the notifications and everything was working.
The next day, I started receiving the notifications very late, then finally not at all.
Since then, when I return to the app, I have the following message: The notification service is not working. It is necessary to restart the phone to re-enable notifications on your tracking device.

I restarted my phone, several times. I even reset my phone since I had other issues that I thought were related. When I reconnected the phone to the bracelet it said it was ok then 15 minutes after the error message reappeared. I also restarted the bracelet, I carried out all the steps of the help read on the Internet, without result. What can I do to make it work again?

Moderator edit: subject updated for clarity

[DavideFitbit]

Hi, welcome to the Fitbit Community forums, @Karinetoutou. 

Thank you for sharing all these details about the inconvenience you've been having with your Charge 5 and for confirming that you already tried a few troubleshooting steps. 

I've been informed that you already contacted the Customer Support team for further assistance with this. In this case, they will let you know how to proceed. You should be receiving a response soon, please keep an eye on your inbox. 

Have a good day.