Unable to cancel month to month contract.

I am unable to cancel my contract with cell c. My data package is on a month to month contract and it even states it on my monthly statement. When I called cell c to cancel my contract they said I need to pay a cancellation fee of R1600 because my contract only ends March 2023. I never renewed my contract. I have emailed them and called them numerous times and each agent has a different excuse as to why I cant cancel my contract. These are the responses from the different agents I have spoken too: Agent 1-according to him the contract I signed it states a month to month will change to full contract, this is incorrect-I never signed a contract, it was an online deal and they are unable to provide the voice recording. Agent 2-according to her cellc changed their policy and changed my month to month to a fix contract-this is *******, no one informed me or got my permission. Agent 3- according to him, an sms was sent out, I didnt receive it and i never agreed to it. I clearly remember a few months back someone from cellc called me to upgrade this contract and I said I am happy to stay on a month to month.I have requested this voice recording with cellc with no luck. The only paper trail I have is my monthly statement, and it reads : 'INFORMATION FOR *** Your contract has either come to an end and you are now on month to month, or you do not have any device commitment fees remaining on your contract. Please contact us to check if you are eligible for an upgrade.' Even with this on my monthly statement I am unable to cancel my contract.