Furious and dissapointed

I called Telkom call Centre wanting to take up another contract with them, the lady who assiated me advised we couldn't proceed with the contract as I did not answer all the questions correctly and that was the last I contacted them regarding a new contract, That happened in August so in September when I received my statement it showed I owed them R2500 where as I pay R250 per month and also someone took a device on my name.i went to the Telkom store with all my documents and evidavit stating I never took up another contract besides my existing one. My address is also changed which I cannot understand I do not stay in Durban I stay in Joburg and now they are telling me there is a voice recording that says I took up this contract, my argument is I don't stay in Durban, Secondly where are the documents that I signed when receiving this device Telkom is *********** and they also cut my line after I paid them what I owed them. I am not gona pay for something I don't have I am frustrated I reported this a month ago they told me it would take a week I have been calling their call Centre everyday nobody could give me answers as to what is happening or how far they are and also it was said that I only reported this on the 11 October 2018 where as I went to them on the 13 September 2018.just because I called them today again and demanded answers now they suddenly done their investigation saying I did take this contract the lady who called me was very rude and threatened to drop the call just because I asked to speak to a manager and I demanded answers she could not give me answers she called me from this number ********** 888 these Telkom agents are ver rude this morning also when I called they put me on hold for 1:46:31 and hung up on me because I asked to speak to a manager.