Cancellation of a contract

Hi my name is portia mohlanga I had taken a mobile contract with telkom ,from November 2019 I have been going to telkom direct mams mall for cancellation, the agents tells me it has been cancelled but still not cancelled I recieved invoice, on the 1st December I went again,still not cancelled, on the second January 2020 I went a lady told me is close,I asked for reference number she told me she is going to cancel it herself so no ref,to my surprise I recieved another invoice for February with a reconnection fee,for what I dont know,my account was supposed to be closed in November when I went for the first time to req cancellation.