I am paying for something I dont have !!!

I went into Telkom Branch at Festivall Mall (Gloria)in October 2014 where I originally received the LTE Internet Modum and complained that this is not good for me as I need a telephone and in the first place this is what I wanted and was told in the Bredtwood Park area where I moved to is no Landlines available and I asked what could they offer me that is not so expensive to skype with my kids overseas, and this is what I was told is the cheapest and the best well it is not for my use it cost me every month over a R1000.00 which I can not afford, when I went in October I was told to come back in January 2015 to cancel and then they can give me something better and cheaper.On the 10/01/2015 I went back to the same branch and was told I can cancel this contract and they can give me a mobile land line that is connected to the internet modum, if I pay R700.00 deposit which I did and they gave me the new system my landline. I was assured that the LTE contract was cancelled as I handed the modum and sim card back at the same time.Up to today they still deducting off my account for something I dont even have!They have even blacklisted me!and everytime I call no one is able to help?!