BAD SERVICE VODACOM NEW CONTRACT/PHONE software problem

Aafter a marketing drive from Vodacom On Line services we contacted them to opt in...I did a contract online with Sherese , waited for about two weeks for the phone to be delivered within less than two weeks after receiving the phone a I PHONE 6 32gig ...there was a software problem and had to be returned ..phone was send back on 23rd of Feb 2018 and since then I have made numerous calls to them speaking to Angela Camp and Ahley Lenard and a bunch of other consultants without any luck of the phone being returned to me (fixed) I have been made promises but up to date the phone has not been returned, I am paying for a phone every month I do not have and also no answer to whether it could be repaired or will be replaced .. I am so disappointed in the service I receive and have asked them so many times to kindly phone with answers ...no FEEDBACK at all.. I will definately not refer any of my friends to them in future