Paying but not receiving services

I called ADT on the 11 December 2019 after realsing that i have not been receiving any calls from them since March 2019 after my house was broken into.

I asked the monitoring operator when last they received a signal and she indicated that they do not have any signal and cannot advise when last they received any signal.

This means that for the last few months i have been paying for a service which they have not rendered .I was told that i need to pay for a technician to come out and check what the fault is.I was also informed that we need to call them as they wont know that something is wrong with the alarm.But if you have not received any signal from a client is it now your responsibility to check or inform the client that something might be wrong? There service is putrid to say the least.