Fraud debt order

This is a fraudulent company that debit money on my account. I called them before a debit could go and told them that I don't know them and I don't know why they lodged a debt against my account. They promised to cancel it and send mean sms that they have but their debt order went through. I'm really tired of these fraudulent companies that goes around robbing poor people. They say on their website they offer legal assistance, to who. Where did they get my information and how do they know if I need any assistance without taking to me. People are working hard for their money and yet there are companies like this. I need my money back and I need them to delete my information on their system.