Xiaomi India — not replacing my phone purchased a day before

Address:

Bangalore, Karnataka

Sir,
I have purchased redmi 4 from website of mi. I received phone on 9/11/2018. On that day only i started facing heating issues not even using the phone. I have not even inserted the sim then also temperature is 44.2c. When i asked for replacement, company is saying that they need 47c minimum to classify as heating issue. They literally have gone mad.in winter season without using phone it is getting heated upto 45 degrees and they consider it as normal.
My complaint id registered with them is wo in[protected] and my order id is
: [protected]
I am here by attaching the screenshots also.
Now i dont need this phone i just need my refund.