Reactivate / Reconfigure Ness Alarm Model Pro-Lk (needs override code)

Rolly requested 3 quotes from Security Alarm Installers in Schofields

We just bought an old house with Ness Alarm Model Pro-LK. I can arm it but I can not disarm it. I wasn't able to get the code from the Vendor.

Reset home alarm system - bosch
need to reset home alarm and 4 remote control keys.

Repair alarm system or new system
I have a NESS 5000 security system that is not working. I would like to...

I have an old GE Simon alarm in a property that I wish to get connected.
I have only just purchased the house and therefore do not have any pin codes...