UNAUTHORISED DEBIT ORDER FOR A FAULTY ALARM SYSTEM

I had my alarm system upgraded and additional beams installed in November 2014. Since then, i have had ongoing problems with the system. Everytime we activated the alarm system and left the premises, after about half an hour or so, the alarm triggered off, This has been ongoing and i have been reporting this matter countless number of times. Technicians had also come to attempt to repair the system on many occasions but, it continues to give us problems. This can be verified with the control room. This week, Portia Letsela sends me an sms informing me that she was going to deduct R8200.01 off my account, it being a long outstanding debt. I tried to get hold of her to discuss this but she was unavailable, I discussed this with customer services and they logged this on the system as to the reasons why i did not pay. Yesterday, the debit order went off my account without my authorisation and without even a single phone call to inform me of this. I refuse to pay for a faulty alarm system. I want the upgrade to be removed. I intend cancelling my subscription today and i am requesting R8200.01 to be refunded Or else i am taking legal action against ADT.