Dissatisfaction and irreversible debit

I had 2 cars under this company's s surveillance. They were sending and calling me each and every time my car looses signal and sometimes call them to inform what is wrong. I once contacted to find out where my other was and they gave wrong information to say it is running somewhere whilst being parked in a garage. I then took out both car batteries as l bought another car and the insurance l am using does not use them. They continued with debits without even asking what had happened until l reversed my money and that is when they started to call me to say l owe and l told them what they did because they are in breach of contract. They then advised that l must pay them R2000 if l want to cancel the contract and l said l cannot because they did not guard against my car. They made an irreversible debit of R731.00 and they promised to continue until 36 and l told them l am no longer their client because l am no longer satisfied with their service. Be careful