debatin on yhe wrong dates. kosting my moneu

Good day. I phoned Cell C the first week in January. Asking them not to debit as I have no money in my account. I will pay cash. I also confirmed that I only get paid the 25. And that my debit date is the 31 of each month. I paid one of my account so long and hat to wait for a week for it to be activated after a spoke to a supervisor. I send an email also reminding them not to debit. Since then they have debated my bank account a couple of times. They debated again this morning. When I phoned this morning the consaltind told me that there was no notes made and that she would log it as did the 3 before her. They are fining me for every bounced debit order and the bank as well. Cell c is costing me in fines more than my contracts. And as she said there is no way of claiming it back even if someone did not log the no debid request.