Would not stay charged and now it wont even turn on.

[Mogritz]

Had i less than 1 month, what should i do.

Moderator edit: format

[NellyG]

Have you tried restartingnit several times? If that doesnt work try a factory resetbusingnthe buttons (see below). If that doesnt work you will need to contact Support (link in my signature ) Let us know how you go 

Restart your tracker

FACTORY RESET USING BUTTONS
On the watch, hold all three buttons for about twelve seconds. This triggers the 2-button hardware reboot after about eight seconds.
- When the Fitbit logo appears, then disappears, release the bottom right button, then continue holding the left and top right buttons until you feel a strong vibration. This indicates the factory reset was initiated.
- This process may take several seconds, and eventually, the Fitbit logo appears and the device boots and displays go to Fitbit.com/setup.
- If you fail to release the bottom right button in time, or otherwise don't follow the procedure precisely, the Fitbit logo reappears quickly and boots without factory reset.

If the device turns on, please go back to the Fitbit app and setup your device back to your account with these steps. Make sure your watch is plugged into a wall plug or a computer, next to the router and that there are no other trackers or devices with Bluetooth on nearby when setting up.  Please log into your account, go to account on the upper right corner, there look for "setup a device" and tap on it. Follow the instructions on the screen and let the watch charge for 2 hours.