Very poor service from supplier!

On the 29th of April we loge a complaint on hello Peter in connection with my cellphone at Vodacom. The next day Vodacom send me an email to say I have to take the phone back to the Rustenburg branch and book it in again and when it is at the advance repair centre I must contact them to take the matter further. I have booked the phone in, in the first week of May after I have been notified that the phone is at the Advance repair centre I have contacted them three time by which they still can't give me any answers. It is just so unfair because I am paying a contract but don't have a phone to use. I insist that Vodacom replace my phone with a new one. This can't go On! !