SONY XPERIA Z3 - ISSUES

I upgraded my cell phone contract on the 01/04/15 at MTN after serious consideration we decided to take the Sony Xperia Z3. why? as SONY advertised (3 different ads) WATERPROOF PHONE!! We used the phone taking photos a week after we got the phone where the phone worked after that, then again on the 24th - well the phone switched off and refused to switch back on - THIS IS WHERE IT ALL SARTED! We went back to MTN which informed us the phone needs to be taken to MTN repair centre and if the device is faulty a new device would be given. MTN repair centre informed us that the phone has liquid damage and MTN nor SONY are responsible for this!!! UNACCEPTABLE!!<br> As a short term insurance broker, I'm going to make sure this matter is brought to the SA Insurance Association's (SAIA) attention, especially after the first question I was asked at the MTN repairs was if I had insurance cover? This means SONY can sell false devices and insurance companies need to pay - I wonder if SONY would reach their sell targets if \liquid damage"is to be excluded from insurance policies. I am not leaving this matter unattended"