I Regret Signing A Single Contract With Cell C

I am very sad that after such a response from Cell C, promising to close one of my contracts on the 11 January on ********** 318 has not been fulfilled. I called your cancellations department on the 19 February 2019 and was promised a phone call by one of your agents Palesa that a supervisor was to call me back since there's been an error from your side. Does it make you happy to frustrate & dissatify your customers? Can someone who cares to listen tell me why I was billed for the above-mentioned line when the request was to have it closed. And also, how does one get billed for extra usage when you have brought forward unused data from previous month. YOU GUYS ARE JUST HILLARIOUS.