********** misrepresentation

Last year a Mondo representative called me regarding a sim only deal, the agreement was that I pay as I use and that it is not a binding contract, this year 3 weeks ago I requested for cancellation because I noticed that they are affecting my credit score negatively and I was told by MTN that ;'I need to pay R900 Cancellation fee because my contract ends next year" i then requested for telephonic recordings when we first spoke and no one sent it to me:, I sent emails to both MTN and Mondo but after 2 weeks still no feedback. i sent follow up emails and but no response.