Muse Headband is not working. Lamp is on, does not go off


Hello! Had anybody had such an issue with the headband?

I was charging the Muse (MU-02, white) using the wire which came with the device. When I took it from the charger it could not connect to my phone. I tried to turn it off, but the lamp stayed on. So now I have a headband which is not working - not connecting, lamp is always on…