Bajaj Electricals — Bajaj immersion water heater 1.5KW

I purchased the bajaj water immersion heater on 15.10.2021 and it blasted the same day when my sister was unplugging it.it blasted on her face and she has burns on her face … her hair, eyebrows and eyelashes . I tried to file the complain on customer care number of baja but they said they don’t take complaints of water immersion heaters. This was a near death experience for my sister and company is not taking any responsibility.Kindly help