Faulty device

I purchased the alarm system on 29 September 2023 was installed second week of October 2023. First day was installed they swapped my radio with another client in Radiokop. left following day or two came & exchange tested according to them but discovered late November its not working logged a call technician called Mr Paul came resolved it few days the alarming & disalarming beeps stop called did on phone no success. Since then have been calling can't get through to a manager especially discovered its a 6 months warrantty, they keep escalating no solution on 20th demanded & spoke to madam Jane promised to follow up same nothing. Today 22.02.2024 called again spoke to Phumelelo says madam Jane not in Office and the manager. Today the technician coming if at all will, l wanted we have understanding all sorted before technician comes. I don't know if l bought a faulty alarm one issue after the other, some times it alarms sometimes it refuses. Complained to speak to manager or they change it since got few weeks before warrant goes off. i have never enjoyed the device ever calling ADT please they need to replace or refund me.