Unprofessional security company

We have recently registered with Adt security in weltervreden park This will be the 3rd month now Till today we have been promised that a technician will be sent to complete unfinished installation at our premises Yesterday the 9th of January 2019 My husband called the call center onli to be hung up on by the consultant We have been very patient We are paying for a service that doesn't benefit us They are unprofessional They are quick to send their sales guys through

We would like to cancel this service with this unprofessional money making institution