Annual license fee even after radio swapped to GSM?

Generally National Security had been good. What I can complain about is their regular annual increases of above inflation. However, when alarm signals stopped being received by them (suspicious as they also stopped receiving my month in law's alarm at the same time), we were told we need to have the VHF radios replaced with GSM radios. Although we don't own the radio, we were charged a R172.50 fee. A technician arrived and swapped over the radio, complaining that the wiring was complicated (it worked before without issue). After he finished, the outside alarm is registered as a panic alarm and the panic sets is recorded as an intruder alarm. "It does not matter" said the tech and left. Also I have inquired numerous time why we are still charged a R383.99 annual fee, and got zero response in 5 emails.