Worst service ever from Vodacom

My phone was sent to Vodacom advanced repair twice. I have a Sony Z3 that is supposed to be waterproof. Twice Vodacom says its a DBR. They passed the buck to Sony. I contacted Sony and they said I must ask Vodacom to send the phone to them directly. I then asked Vodacom to send the phone to Sony repairs to be assest by them. Today I found out the phone was never sent to Sony, but AGAIN to their advanced repair centre. And guess what. THEY COULD NOT FIX IT. I know that from the first 2 times. For crying out loud!!! IS THAT SO DIFFICULT TO DO WHAT YOUR CUSTOMER ASK??? JUST SEND MY PHONE TO SONY PLEASE!!!!!