adt caharges for nothing

Adt has been a very useless company 1stly u bridged the contact when this service was offer in the contract was never advised that i will be charged for come out every time the alarm activates, 2nd since i installed this system it never works every time it activates on its own and i am charged for it without my consent. the technician came out on the second month stating that its a faulty alarm that u people installed and booked a reinstallation which never happened since . over 6 months i am been charged. worst ever alarm company i dealt with.