Billing

Good afternoon My account number is I ********** -7, I have made several calls to the call centre and to the subscriber collections regarding my account. I have receive a letter to state that I need to pay R1100.00 for a balance of contract. According to the consultant Zandile the contract has been cancelled on the 25 January 2018 and that is the pre cancellation fees and the contract only ended on the 30 March 2018. I have still made use of the contract in February 2018 and March 2018 receive my free minutes and a invoice that has been paid for February and March. I have logged two service requested made several calls but can't seems to get answer why I need to pay the R1100.00 . Kindly contact on us on ********** 679. Thank you very much