Flipkart — Nextbit robin

Address:	Mumbai City, Maharashtra, 400086
Website:	Flipkart.com

I purchased next bit Robin, fully trusting your easy return policy
Since yesterday I have been trying to resolve this issue, I got a call which got disconnected, and then I got a message that we will call you on 16 at 4 pm
I tried calling customer care, three times I was told there are issues with the system and you call back, now I am literally frustated, similar thing can happen yesterday and continue to frustrate me
Phone has multiple issues
1) heats quite significantly
Your app may not be able to detect but it heats immensely
2) multiple crashes on phone like 'NEXTBIT LAUNCHER HAS STOPPED'
SMART STORAGE HAS STOPPED'
3) autorotation function dies not work properly
Your smart check dies not have a sensor for that
4) sometimes the mobile loose sim card connection spontaneously so I don't get any calls, this could be deadly for me as I am a doctor
5) multiple other issues like speaker at full volume starts to give trouble

6)Now since morning it is dead and not starting
Please help me get out of this mess
I am a doctor I cannot be without a phone till 20 date that your customer care executive had promised