No Confirmation of cancellation

On 18 August, I requested that the unit be cancelled as it was draining my battery and i was replacing it every 12 months. I was then advised that it was the panic remote, and went and had it exchanged. Today the 21st I tested the panic remote, with no response from Matrix. Upon querying with Matrix I was advised that the contract had been cancelled. I was sent no confirmation to date of the cancellation. As my debit order had gone off on the 1st I was under the impression that it was still active. I am totally disgusted with the NO SERVICE from Matrix. I then get a letter from the above person stating that the contract is now cancelled and I owe them R999 - how disgusting!!! I am totally taken aback with their attitude. What if something had happened in the meantime, if my car was ****** or attempted hijacking. And all they had to say - \I APOLOGISE!! Not good enough"