Sony India — have bought a sony xperia C and made a big mistake

Address:

Pune, Maharashtra

its been 5 months i bought a sony xperia C. its a fake phone provided to me. went to all the service centers in my city but they cannot detect any problems. whereas the problems i face are millions. 1) Andriod crashes like once a week 2) My important data is lost all the backup is gone as when i reset the phone it erases all the external memory card data too. 3) horrible battery backup 4)the phone gets heated up in lyk 30 mins with continous use etc i have requested all the service centers to replace it but still no revert from their side i please request you to take some action. im facing a hell lot of problem with the device