ADT serious harrasment

Ive been having difficulty getting rid of ADT for years now. I used them at my business but a ********** account was added to my account which was debited from my account without me noticing. Eventually after much difficulty and time, they stopped the debit order but never refunded me. Not long thereafter, my business got broken into and most of my stuff got ****** so i closed up. ADT refused to take responsibility and i found out that according to ADT, the radio transmitter was faulty. I decided to leave ADT at my business and home and joined National Security. ADT still kept on deduction which i had to reverse every month until it got resolved after about a year! I got the same **** service from NATIONAL security with faulty equipment which never worked. Eventually, National Security got liquidated and guess what, ADT takes over their contract! Now im back in the same ****hole and ADT just keep on deduction. These people are worse than ridiculous! How do you stop them!