DAYLIGHT ROBERRY

So firstly I got myself the IPhone 5s from Vodacom on contract lets say 6months ago (still under warranty) , don't get me wrong the phone was working perfectly normal until it stopped charging and did not want to go on. To my concern I then took the phone into the store at which I bought this to find out what could be the problem, I am really not to sure if I am the only one who experienced this with regards to my phone all of a sudden being WATER DAMAGED and believe me the phone was not close to water or dropped into water, the phone has a protective cover so you tell me how the hell this phone got water damaged? I now don't have a phone and they are charging me R3000 to do a swop out for a \new phone"how true this is I do not know. because the consultant tells me that iPhone's does not get re-furbished? so why do you keep my old phone I then asked her"