Hello, AlenaB ,
Our system works with the data that the tracker sends in messages.
Most likely, your device has stopped sending data to the platform.
Therefore, first of all, check the following:
1) SIM card balance and traffic limits
2) Intervals of sending messages and the mode of operation of the device
If the problem cannot be solved, write to us at email@example.com, indicating the login, unit id and device type, then we can check it additionally.