Very Disappointing

our property is sold and we requested cancellation of the ADT services to date the service has not been cancelled bearing in mind that they require a months cancellation which was done . i recieve a call earlier from the person that purchased our property telling me that i need to contact ADT to cancell as it still has not been done , so ADT went and gave this person information about me without even knowing who she is and without me providing a password. so you tell me how safe is a person with ADT if they are just giving out random information about people that has no financial interest and they are supposed to be a security company . How safe is a person under your watch if you are just divulging information. i am Disgusted and very disappointing