Micromax Yu Yureka — facing problems in my handset even after updating to lollipop.

Address: New Delhi, Delhi

I have updated my yureka a week ago, and still its rebooting itself, battery drainage is terrible and obviously the heating problem. I bought this handset more than a month ago, it even automatically reboot on its first day. I called Yu service centre, they told me that these problems will be gone after updating to lollipop version but i am still facing all these problems. I have been trying to contact Yu service centre but cant connect to them. please help me.