Vodacom repairs, utterly useless

I have taken my phone to vodacom three times now. They were not able to fix it the previous two times and each time they hand the phone back to me and say that it is in working order. After picking the phone up for the second time and inspecting the completed job card, I showed to them in the store that the phone still isn't working. After collecting the phone for the first time, I went through great pains to call vodacom and explain in detail to them what the problem was. How is it possible that I hand in the phone for a second time and the engineer's report says that no problem was found with the phone? Why didn't someone call me before coming to this ridiculous conclusion? And it took them a week and a half to do absolutely nothing to the phone. Wow. I have now been without my phone more than four weeks. When is this all going to end? I last handed my phone in 10 days ago. The manager at the repair centre said that the third job is a high priority job (oh please...). I had to buy a phone to use in the mean time. This while I'm paying my full amount for the contract. The phone is still under warranty. I'm paying top dollar for a premium device that I cannot use. WHAT A JOKE.