ADT HAS NO INEGRITY IN DEALING WITH CLIENT

I was furnished with an alarm system which does not work properly and kept giving me endless problems. The contract was very poorly serviced and at times not serviced at all. I gave ADT numerous opportunities to rectify the problem. they came into my home and ruined my property with poor workmanship. I have complained endlessly to management and was told I will be released from the contract. I was still billed for the contract. I was later \released"but have to now pay for the full contact's value. How is this ethical? I have requested for the equipment to be released and to repair my property of the damages that was created by ADT. I was then called by a man who was threatening and aggressive in his speech"