No picking up Contract details

Vodacom has taken over all their clients from Nashua's since closure this year January 2015, my contract was taken last year December 2014, I had a problem with my Samsung device which is still under warrenty in March 2015, I was given the rat race by many Vodacom stores being put from one department to the other, finally I took my device to Vodacare in Old Main road Durban on the 14 April 2015, my device was left their for repairs, its being 3 months and I had no feedback, Then on the 29 July 2015 I recived an sms to pick my phone up or it will be sold to defray expenses, When I got to the store to retrive my phone it was not repaired, Vodacom Durban said they cannot pick up my phone details and it cannot be sorted out, for the pass 7 months my account gets debited by Vodacom and I get charged for my phone and BIS on a Samsung device??? If Vodacom took over clients why cant you guys provide a service that I pay for. Please guys look at your statements because their are companys out their to rip people off!!!