Help! Does Anybody Have This Turtle(Red Eared Slider)

I bought this baby couple of days ago. I have been feeding him green pellets but he won't eat them. I have seen they require basking light and heat light etc, but here in India and in my city, the temperature is nearly 40°. So do I still need to get those bulbs or what are the other reasons he isn't eating anything. Anyone who has them or have had them, please help a brother out. I bought this stone like structure yesterday and since then he isn't coming out of the bell