Snapdeal — Apple Iphone 6

Address:	Gurgaon, Haryana
Website:	www.snapdeal.com/?utm_source=earth_brand&utm_campaign=snapdeal&utm_medium=brand%20term,1t1&a

I had ordered an Iphone 6 from Snapdeal for Rs 36, 760 and it was delivered on 18 May 2016.
After 10-15 days the phone started to switch off on its own and then switch back on again. I was a little skeptical but didn't react because it was working properly when it switched on. Until one day when the died completely and did not switch on for 2-3 days.
I contacted snapdeal and they said that we will send an engineer to your place to check the phone tomorrow. I waited for the entire day and no one came so I called Snapdeal again. The supervisor there told me that there was wrong information given to me and no engineer can come so I will have to go to the Apple Service Center and get my phone checked after which Snapdeal will help out.
I went to the Apple Service Center and they claimed that the phone had a liquid damage + some display taps missing + boards scrapped which clearly meant that i was given a spoiled phone.
Then I called snapdeal and i asked them to speak to the supervisor, my call was transferred and I was told by that person that he has scheduled a pick up with in 48 hours after which i will receive a replacement within 24 hours. He provided me with a reference id as well.
Next day I called Snapdeal to reconfirm and i got to know that the guy I spoke with the previous night was firstly not a supervisor and secondly he game me the wrong reference id.

Seniors at snapdeal then refused to do anything as they claim that they have a "7 Day Policy" and I should have claimed it only within those 7 days. But how would I know within those 7 days when the problem arose only after 10-15 days???
They say that it was a liquid damage done by me but they have no answer for why the boards are scrapped or why the display tap is missing!

I would want a refund or an original replacement of my phone.