Intex Mobile / Intex Technologies — my new intex aqua s3 phone

I have buy a intex aqua s3 one month ago on 13-08-17 from gaurav electronics 15 dispensary road dehradun. But it start to hang within one week and from 7 days i. E. From 8-09-17 my phone is completely switched off it is not even opening. When i discuss this issue with the dealer from whom i have buy this phone. She is telling me to go at the service center. And at service center firstly they refused by saying that they are updating there computer softwares but later on when i tell them that they are telling this same problem from 4 days they kept it with them. They kept us waiting for 2 hours and didn't do anything now they are telling me to take this phone after 2 days. They told me that they will check what is the problem in the phone. Thats why i hand over my phone to them. This is completely insane i have wasted my 6 days for this stupid phone. I am without phone from 7 days this is ridiculous. I am a college student and i have wasted my so many days. I really want to replace that phone. I really want to ask that a company manufacture such a phone which stops working within one month. I want my money back. I dont feel after repairing it would work. I want my money back.