BAD BAD VODACOM

What a bad service I am receiving at Vodacom, on March I opened online contract of Iphone6, after few days I experienced problems with speaker. I called them they asked me to go to Vodacom shop near me, really I went there. To my surprise my iPhone is CPO and no one explain that to me & they didn't take the phon, they said a better way I must call so that a courier can fetch it. I called them AGAIN, on 7 April courier to fetch my cellphone, my phone was OBF and have a problem with speaker. Till today I don't have a phone and the keep on billing me. I spoke with everyone from Vodacom from manager down just empty promises. I called emailed inboxed etc they will ask for my details and promise to call till today NOTHING. I don't have a phone and i don't have any hope to have it soon but they keep on billing me. VODACOM IS MAKING MY LIFE A MESS AND NOW I DONT WANT ANYTHING TO DO WITH VODACOM