Xiaomi India — mi note 4 phone bending

Address:

Ernakulam, Kerala, 683102

I bought a new mi note 4 few months ago from a mobile shop at alwaye, kerala. Few days after i found that the sim tray is projecting outside the body of the phone. I removed the mobile case and shocked seeing the body of the phone if bending towards the opposite side of the screen. The small metal portion at the side of volume, on/off buttons and at the side of the sim tray is bulged outward. I placed the phone over a wooden surface and pressed carefully to clear the bend. It was partially successful, but the small metal portions near the buttons bulged more. I affried if the phone is not working. But when i switched it on, it worked. Still i am using the same phone. I feel it's build quality is very poor. Any one can say where i could make a complaint... Pls help