Big company that con on poor citizens

********** , I asked them to stop an unknown debit order that was going through my account for more than 2 years, and they told me they can't because it comes back with a different reference number every time, then I asked them to close the account and never did, now I receive calls from their legal department saying I owe them R8000. When I opened the account they promised that my money is in safe hands but when unknown debit orders are going through my account they fail to help.