Extremely bad customer service

I have been back and forth on a few telephone calls with ADT with no sense of urgency or lack of any effort to assist a customer.

Problem statement: I am a home owner who was a client of National security ,as you may well be aware they have been liquidated and bought over by the ADT group. This now makes me an ADT customer . My issue is that I am trying to install outside beams in my yard for extra security however the security key pad and control panel previously installed by National seems to be outdated. I have reached out to ADT security to ask for assistance since they are the new owners of the new contract, my request was for them to install a new control panel and key pad so my outside beams can be linked to the alarm system but I have reach a dead end , it seems the attitude from ADT is that there is nothing they can do but I refuse to accept that as I am a paying customer and feel they should be accommodating and trying to assist .