Mtn ruined my life

Around March this year I received a call from an mtn agent about their sim card data deal after Taki the deal they sent me a sim card that didnt work after calling and sending email complaining they did not resolve the matter.. And when I stopped paying they took me to the lawyers... I paid the amount the amount they claimed I owed for the sake of my credit score but this they haven't removed my name from legal... If you are considering a network please stay away from mtn it is the worst service provider I'm even considering writing to icasa or go to speak out