Orient Electric India — complaint towards the noise coming from ceiling fan orient

I have purchased orient ceiling fan model new air 600 mm in the month of march 2017, i think in october itself it started giving noise from the fan. But we thought it will be a minor issue and will get resolved automatically. However it continued and finally in november around 19th nov 2017 we made a complaint, and technician came and attend the service call, he opened up every parts of the ceiling fan including motor, he did something and fixed again, the noise disappeared.
However again after 10-12 days the noise started again from 3rd or 5th dec 2017. I am totally fed up with the noise as it is giving a so lousy noise that irritates a lot while you sleep.
I need my refund amount / or replacement with new fan immediately. I think there is seriously something wrong with workmanship of orient fan all the models as i have heard similar kind of complaint from others too.
Please i need some action immediately.