Vodacom sells broken phones

With reference to my previous still unresolved report: A few months ago I took out a contract from Vodacom. My worst experience ever! Phone gave problems within the first 24 hours. I took it back and they said I must give it some time. Phone freezes, Network cutouts, battery must be charged 3 times a day, I can't always hear people on the phone, I get text messages saying I missed calls but the phone never rang and people tel me sometimes when they phone me my phone goes straight to voicemail. 2 weeks ago to date someone a man from Vodacom phones me and says the store must sort out their own problems and not send clients to the toll free centre. He said I must go to the shop ons Saturday be there at 1pm and he will phone and force them to assist me. I went and waited like a doos and no one phoned. The store is always so busy you wait forever to get help and because the store is so small you sometimes have to wait outside. Ridiculous service and quality! For 10 years I never had that problem with MTN I should have gone back there but I was referred so yah...