Taking no responsibility

Sony Z1 compact, went in for repair via Cresta with a battery fault under warranty. Came back, not fixed, went in again. Battery and some other parts were replaced. THis took at total of almost 4 weeks. We had to buy another phone in the meantime as no loan phones we given as an option. Got phone and treated phone like always..... meaning, we bought a waterproof phone, we expected back a waterproof phone, guess what, it was not waterproof, now ARC and Vodacom is saying that it was negligence from our side and refuse to repair/replace the phone? Totally unacceptable. we were told we must come and fetch the phone, but they can't guarantee that the phone will still work. We gave them a working phone.<br> <br> The attitude from the staff was totally plain rude no customer service in mind.