@SSV thanks for your inputs.
I have purchased 5 USHA fans online in 2 orders. 3 came from a seller and 2 came from another seller. The 2 are making noise withing 3 months. I reached support and they said, if it was purchased offline, direct replacement is done. As it is purchased offline, it can't be replaced, the binding is replaced, the motor is replaced but still the issue is not resolved. It costed 3500.
Although I have purchased many thing online like Fridge/Microwave/Mixer/Kitchen Sink/Geysers,
I am unsure. There are 100s issues people have faced with laptops & TV specifically. That's why I am concerned. Saving 2-5K is not worth hassle of online.