Diversion of Liability

I upgraded my contract with Mtn in November 2014 and took an iPhone 5S 32gb, earlier in 2015 we realised that the phone has a problem because it can not keep battery life as a result you have to charge it over and over again. I then took the iPhone to Mtn 14th Avenue for repairs on the 13th of April 2015. I received a reply from Mtn informing me that the iPhone has a water damage, kindly refer to the enclosed pictures as provided by Mtn. I strongly deny the claims that the phone is water damaged because I have been using that phone and at no point has that phone come into contact with water. Mtn can not substantiate the claims that the phone has a water damage and they are just using that excuse in order to divert liability. <br> <br> I am certain that if we can take this phone for a second opinion, a factory fault or some sort of malfunctioning is what will be written on the report not water damage.