ADT alarm system ****

I signed a 24-month contract with Fidelity ADT in September 2019 with an initial amount of R4100 for alarm system to be set up at my place and then a R350 monthly fee. I never had much to complain about as they were always responsive to when my alarm tripped, and always seemed visible in my area, so looked past the gradual increase in monthly premiums to the current R425 per month and the ridiculous Annual Radio Network fee R362 charged every November. But then in March 2021 my alarm started going off for no reason and when a technician came out to have a look, he said it was damaged by the heavy lightning we’ve been experiencing he would need to replace the alarm system and it I would need to pay around R2800 for this to be done. I figured because this was an act of nature I’ll pay him to get it done as the other alarm systems in my other property has been going well for years, fast forward to June 2022 just 1 year 3 months later and the alarm system again started going off for no reason and eventually just died on the 6th June, I contacted ADT they sent out a technician on the 8th June who looked at it and advised he would need to replace the alarm system but it should be covered by ADT if it’s a rented system. I explained to him my 24 month contract ended September 2021 but I still pay my high monthly premium he called me later in the day to say my system is not rented and I would need to pay again out of pocket for the alarm system to be replaced. And this is where my nightmare begun because I am contacting the technician call centre to speak to management to assist me because what cheap system are they putting in this property that I needs to be replaced so often and that I need to pay out of pocket for? I’ve been promised numerous times that I will receive a call back from management but to no avail. I also tried reaching out to the technician if he can escalate it on his side but I am not receiving any feedback. All of this while my property is at risk as I am currently sitting without a working alarm for the past 5 days and they will be expecting to debit my account with no issues come end of the month? Can I please get some assistance with this very urgent issue.