Poor Service, Arrogancy and No Value for their clients

My contract of 36 months expired on the 7th of April 2021 and I had called they in January 2021 and they advised me of such and didn’t not inform of the process that needs to be followed for cancellation. Now I am still being charged they same amount and their telling me I owe them R240.75 and said my contract matured, it didn’t expire and tell me that I am on a month to month, and if I have to cancel my contract then I must give them 20 working days notice, I had no idea of this, I am extremely furious with cartrack and would never recommend it to anyone, I believe should have been given an opportunity to either go on a month to month or cancel prior to the contract expiring. And its madness for them to expect me to pay the same amount that I was paying before, it’s like having a cellphone contract and still being expected to pay for the device after the contract ended.