Matrix Customer Service agents fall flat

I called Matrix to cancel my policy with them only to hear that I will owe them R1700. When I asked why,they said my contract is not complete. I asked the lady how long is this contract she told me 3 years. I would never have signed off on a 3 year contract anyway. I asked her to please forward the contract which I signed. She told me that by accepting the unit being installed in my vehicle, I agreed to the terms and conditions. The more I tried to get to the bottom of this the more she just talked over me. No agent contacted me previous before installation to inform me of the terms and conditions nothing. She said to me it was emailed to me, I asked her for the email address and she gave me an email address I closed 4 years ago. They only put in the unit in on 3 May 2024. How do they use an email address which has been dormant for more than 3 years. She was utterly obnoxious towards me. She is suppose to be Customer Care but she does not belong there.