Bajaj Electricals — Fan burnt - who is responsible???

Address:

400604

Compliant no. Mum[protected]-1

My bajaj wall mounting fan was burnt during night when it was on in the month of april 2016, since then im following with bajaj for free repairs, but bajaj is least bother to give me service.
I want to know how the fan was burnt, who is responsible??? Its a 100% manufacturing fault.
I have received the call from bajaj service centres but they are asking me ti pay the money towards service charges, my question is why shall i pay the amount for service. As the product manufactured by the company cant be prevented from getting fire.
It was our luck that every one was available in the home, if only kids were available then every one can understand what will be the impact of fan getting burnt.
The whole building would have gutted in the fire., this is how the product is manufactured by such a big brand company - bajaj.