Portronics Bluetooth Speaker Not Turning Off

Brand: Portronics Model: Dash 3 Was listening to songs on this Bluetooth speaker when I received a call on WhatsApp and I answered it and switched to phone's speaker. The call went for long and when I disconnected, the music didn't resume. I tried reconnecting it with the phone but even though it got connected, there wasn't any sound coming from the speaker. I tried turning it off by long pressing the power button for 3, then 10 and eventually for 30 seconds. But it just doesn't turn off. It also has an AUX jack. Surprisingly, it is playing audio via AUX. Every function seems to be working fine except being able to play audio via Bluetooth or turning off. Is playing audio via AUX to completely discharge the battery the only way to turn off or reset this speaker? Please advise.