Poor service / Contract extensions without consent or advice

I had taken a home internet package in January 2019, contract length being 24 months. (meant to end in January 2021) After calling Telkom, I am now advised that the contract is extended to Feb 2022 because it was changed to a wireless package in Feb 2020. It was changed in Feb 2020 to a wireless package, because they advised that the ADSL line will no longer be available and working in my area, and that this will not change my package in anyway. Now, however the contract has been extended, and penalties will be charged for cancellation.