Issue not resolved

i took out a contract with Telkom for two Tablet in 2011 . in 2014 someone took out a contract phone S5 Samsung using my details and i didnt know about it until i got a phone call in August 2013 about billing . Ever since this hasnt been sorted out, I've made numerous phone calls to telkom trying to find out what the Frauts department are doing about it . Everytime i call i always get told that i will be contacted in the next 48-72 hours on which they never do. a year letter i'm still the very same person who keeps calling them and i get told that they still busy with the investigation and they know when will this be sorted out. i asked for a direct line for their's frauts department and i was told that they dont have that number . this is affecting my credit rating as well as this comes as i have too much debts as well, Always passing the buck .