Double Payment Taken

CellC debited my account early without bothering to inform me so the debit order was returned. This is the 2nd time this has happened. I sent CellC an email the same day asking when the debit order would go off again, no one bothered to come back to me so I contacted Cell C via Facebook. I was told to do a direct payment. I was reluctant to do this as the last time this happened, Cell C also told me to do a direct payment but my account was debited. So I phoned Customer Care and was told to wait for debit order to go off. In the meantime I still had not had a reply via email so I sent another email & Cell C phoned me today. I was told to do a direct payment and that my account would NOT be debited so I did a Eft transfer this morning only to find this evening THAT CELL C HAD DEBITED MY ACCOUNT!! So now I have paid double. This is totally unacceptable, the correct information should have been given to me right from the beginning, no one at Cell C could have been bothered to find out if & when debit order would go off AND GIVE ME THE CORRECT INFORMATION. Now money I DID NOT budget for is gone and who knows IF & WHEN I will get it back.