CELLC - R900 ****** on a so-called additional Debit

I write WRT a serious fault in the CellC billing system that has resulted in a double debit on my account for the amount of R1000. Apparently due to migration from an old to a new system Cell c debited an amount of R759 end of March and then +/-R960 on the 2nd of April. It has taken to date to provide sub standard, poor, ineffectual and lying feedback. In fact , I have made over 20 calls and been promised on 20 different occasions the date of the R960 refunded, resulting in poor feedback and empty promises, to enlighten me or seemingly the other 1700 customers (who I am told have been affected) I want my money back. CellC has effectively reached into my account and ****** money from me as I have signed absolutely no permission for you to do so. This is inexcusable. While I am told it is being rectified, It is not done for me. I have asked on numerous occasions to be put through to a senior operations manager and have NEVER EVER EVER had the courtesy of a return call. All I do is speak to call centre agents who act on what they are told (inevitably ******* promises not met) who have absolutely no knowledge of the progress of the major issue I have. CellC is not above the law and no one is contactable. There is no central switchboard and the directors hide behind the inability to contact them. Shame on you CellC