ALARM RADIO INSTALLATION FAULT

ADT replaced their alarm radio transmitter in our house some years back and since then when the electricity comes back on after any outage or load shedding the system sends out a panic button signal to their control room resulting in a phone call and armed response. Their technical centre refuses to fix unless I pay for the technical call. I did not ask for a radio upgrade or change out, what ever it was, that was requested by ADT and I do not see why I need to pay for a faulty installation that followed or having to bear an armed response call ever time the electricity comes on. The matter has been reported to their call centre numerous times with zero action and just a blank insistence that to solve the problem is for my account. I do not own the radio and do not see why it should be for my cost if it was wrongly installed.