FADT - Cancellation the worst

I have tried cancelling my service with FADT for more than three weeks. I have been on calls with the retentions and customer service departments, numerous emails and still received no response or follow-up. When you call them, they hang up.

Just the other day, they debited my account again (after I had tried processing the cancellation and informed them of my intentions to go with an alternative security provider), with no updates on the cancellation of the service.

I have had attempted break-ins with a response time on average of about 30- 40 minutes. The one time with a random person in the car (clearly not working for the company), recording me. The service is shocking, but the process to cancel and try to get your money back is even more so. If anyone has been through this and knows how to get it solved - please help!