vodacom refusing to repair my phone

Im at wits end this is my second hello peter complaint , My sony experia z3 is one month old and is water damaged. Vodacom told me this and refuse to repair my argument is that the phone was supposed to be pressure tested to see where it leaked in to blame me or to accept blame. See flowing e mail I received from Vodacom repair centre.job number ***<br> Good Day Carl<br> <br> I have requested my Manager Dieketseng to give you a call back.<br> <br> Regards<br> Portia<br> This was on the 9th December come on Vodacom is this the type of service you want to be known for. Even on my previous complaint here I was promised someone will get hold of me shortly ?? I am still waiting . Do I also need to put up a billboard with the complaint of the bad service before someone will respond???