Awaiting repairs/OBF for 2 weeks and going

I upgraded from Vodacom on 8 of march 2015. After waiting 2 weeks for my phone I decided to go with a Sony z3, because huawei never delivered stock. I got my phone mid march and went home. The next day i was back at Vodacom repairs centre and booking it in for a OBF. Another week later the phone came back after they told us there was no fault found and then said they did software update. When I putted my phone on again, I experienced the same problems. That same day I was back at Vodacom and they told me to book it in again. I phoned vodacom to ask what to do since I was scared the phone wil only come back again broken. Then they told me they never worked on the phone because there was a phone block. Which I could not remove again because my phone could not switch on again and no one told me to remove anything. So my phone is in again and tomorrow mark almost one month on my new contract and stil no phone.