fix and cancel the contract asap

Good day My name Sthembiso Mbatha I would like to report that I took a contract with you. The lady who was helping me said the contract will be R280 and i will start paying in July the 15th since i get paid that day off-witch I agreed. Then after that she said the is a bonus for data do I have any number that I could give her so that I can get data for free I even I ask her why don't you put data on the sim card that you are going to send me she said no i have to give her another number I gave to her. Only to find out that she was lying to me in a week MTN closed my line and said i pay R180 then i paid. then Mtn now wants me to pay R489.66 for my contract because according to them i took 2 contracts and I don't know anything about that. When i call your call center they busy make me a stupid pretending that they fixing it and they are not can you please attend to it because I'm thinking of going the legal route because this is *****.