Been waiting for my repair for nearly a month now

<p>I sent in my phone Sony M4 on the 15 November 2016 under warrenty repair. The replaced the main board and sent it to fourways branch for final testing. They then found out that the mic is not working so they sent it back to Vodacom for more repairs. This is going on for nearly a month. When i phone them i get they will esculate the problem but isnt doing anything about it. I need my phone. When i recieve the Job status all it just says is in exchange process. Please sort it out for me!!!</p>