Cell C upgraded my contract instead of Terminating it as requested

I am a Cell C customer, i called the Cell C customer service in December 2017 for them to cancel my month to month contract as from Jan 2018 and we agreed to terminate the contract. Yesterday the 26th of January i gave Cell C Customer service yet another call to double check that my contract has been terminated( as previously agreed) and there will be no Data loaded into my account this month end of February 2018, i was advised that this was not done and therefore i was promised that the contract will be terminated accordingly. The consultant i spoke to assured me that he was working on terminating my contract and after 5 minutes i will receive a confirmation sms stating that my contract has been cancelled. i did receive an sms from Cell C, but instead of it being a cancellation of a contract it was informing me that my contract has been renewed. I called them again this morning and no one seems to know why my contract was renewed instead of being cancelled and no one is taking responsibility. I am fed up because i struggle with coverage in the area that i stay in and i need to change my network provider and Cell C is busy playing games with me upgrading and debiting my account.