One Plus — Faulty chargers

Address:

110019

Sir,
I had purchased a one plus two mobile on 18/8/2015.
Within 4 months, the charger stopped working. I contacted the service centre in Bangalore and after one month of begging, they replaced my charger in January 2016.
Now within 3 months of replacement, this charger stopped working again.
The service centre in Delhi is refusing to give me a replacement since 6 months warranty is over.
However that 6 months warranty shouldn't be applicable here as they replaced my charger with a faulty one.
I had to travel 4 hours to go to the service cenntre which finally refused me.
i bought a new usb cable and adapter worth rupees 1200
Sir i want some action against the company for pathetic service and handing out faulty chargers.