Kutchina / Bajoria Appliances — Kutchina chimney blast at night when not in use

Hello team,
Yesterday there was a terrible incident happened. Kutchina chimney which I had purchased last year around got blasted, and its glass particles spread throughout the kitchen. Luckily as there was no one in the kitchen at night time, no one got injured. But i saw the similar complaint on this forum by customer( Sanjib kumar gogoi from Asam) TWICE.
I am having two asks:
1. Root cause of the issue, so that it wont happen again( logical explanation)
2. Repair done at earliest

Please respond and send your technician at my place soon