Vodacom breaks my phone and no one cares...

My Samsung galaxy s3 had an audio problem, phone was just fine other than that. Sent it in for repairs on the 25th july, after a few days i had no feedback. I phoned the repair center and the technician said they had not worked on my phone yet because they had no charger for it. I spoke to the center manager and he said he would make sure my phone got out quickly. I eventually get my phone back and when i tested it, it would not boot up at all. So i took it back to the walk in where they referred me to a different walk in shop and after explaining my situation their only solution was to book my phone in for repairs AGAIN so that they can repair a problem that THEY created. After two weeks or so i'm smsd to collect my phone at the walk in store, tested my phone with the assistant, still does not boot up! They had my phone for two weeks and did ABSOLUTELY NOTHING with it except lie to me every time i phoned to ask for progress status. so they booked it in AGAIN, that was on 28 aug, now it is 1 october and all i keep getting is misinformation. my phone has been with vodacom for over 2 months in total and still nothing. Phoned call centers, managers, but they keep passing the buck.