5 day old s6 faulty,Vodacom refuses OBF

It is almost 2 months that i have been without my new phone. My brand new Samsung S6 was returned within 5 days after receiving it from MOBILITIES VODACOM in Newton Park where my contract was upgraded.My phone was sent in to a repair centre so the fault could be identified. After 2 weeks vodacom could not find fault with my phone.I had my phone for half a day and it did exactly the same. I returned it to vodacom who then again sent my phone in to be \inspected"still no fault was found.After another 2 weeks had gone by and my phone was returned to me. Again Vodacom said no fault was found. I took my phone to Samsung TTS in Port Elizabeth who immediately found the fault and ordered the parts.Why can samsung in Pe identify the fault immediately and after 2 failed attempts Vodacom finds no fault.Is it too much to ask?It is much easier to tell the client that no fault could be found. I am so unhappy with Vodacom!!!!The service is shocking.I have a brand new phone that is still broken and according to Vodacom there is nothing wrong with my phone.the service is shocking!!!!i am losing clients by the minute.Vodacom is not the better network!!!!! I will never be a Vodacom client again EVER"""