Sonic Telecoms **** to Me.

I have been with Sonic Telecoms/Fusion Wireless for almost a year now. I was initially on one of their Wireless Fibre packages, which was a relatively secure and reliable solution for the time that Fibre was not available in our area. The sales consultant I spoke to when I signed up, James Korsten, told me that I would be able to use the Wireless Fibre until such time that Fibre was installed, and then I would be able to upgrade to a Fibre package without any hassle or financial implications, supposedly a seamless transition. When Fibre was installed in our area, I called Julia Engelbrecht, who signed me up for a Fibre contract. I also asked her if there would be any thing more to be paid because I was terminating my wireless contract. She assured me that I would only pay what I was quoted for the Fibre connection package. When my first invoice for the Fibre Package arrived, I saw that I was still being charged for certain items on the Wireless package I had before. I contacted Julia and she said that I needed to contact the accounts department. After several calls to the accounts department who told me I was still obligated to pay the remainder of my previous contract, and that I was misinformed by both James and Julia. I have tried calling and contacting Julia, without any response for the past 4 months. I need someone to resolve this issue!