Still disgruntled

I have had an alarm system with chubb since from 2012 which was then conberted to chubb 2 years back. No upgrades were done. Last year the alarm started malfunctioning and the radio alarm was not picking up a signal when we did regular tests. Somewhere in November..we could no longer arm it as it was just blinking. Basically. We were just arming an alarm that was not linking to the ADT. A technician was called in Novemberl. He confirmed that the system was outdated and had a short fuse and was no longer sending a signal and could potentially cause a fire. It was then switched off completely.A quote was done and amounted to around 6k to fix the system. After negotiations and escalations with the manager, we had to redo a new system. A quote was done for a new system which was R4253.85. We went into the vetting system and waited a whole wek to be told that we failed the credit test and must pay We were told the old alarm wil be cancelled. I paid on the 14th abd the new akarm was installed today the 21st. After many follow ups. In the interim, I waited for the cancelation leter which i never received. I logged a request with ADT two days ago for the cancellation which i received a cancellation letter today that I owe R1743.00..The radio fee is also included there. This is my second review and I am not happy with the service.