sage pay and pragasen

Last month I received an sms saying a debit order for R99 was being taken from my account, no idea who it was so went to my absa branch, put a stop order on it, they still took the money, had it reversed (another trip into the bank) I phoned sage pay who deals with setting up these debits, they couldn't help me, and put me through to Pragasen as the number I had for them was not in service. I told the lady in no uncertain terms I had not authorised this and to ensure they stopped stealing my money, she said she would put a stop on it and an investigation would be done, I heard nothing back. This month I received a reminder to credit my account for the debit order! New reference number but same company, same amount. I went again into my bank this morning, put another stop on it. The lady informed me there is no way I can permanently stop them taking money, they can just carry on using different reference numbers, they only way is for me to get a lawyer, get legal wise or take out their legal cover for R80 a month. How can people go into my account and just take my money without permission. I'm a single mom and every rand I have precious, will just close my account