Guard risk

I think they opperate under Momentum. They have been deducting money from my account for more than 12 months. You never get a notification, on your phone, therefore its difficult to pick up. I have tried to contact them with no success. I have no such policy with them, and have not authorized any debit order to go off. My bank cannot help me. I have seen numerous complains about the same thing. Can you please help me. THE have deducted more than R7000 already. I need this to be stopped urgently