First system fitted and found it to be a second hand system which continued giving problems…

First system fitted and found it to be a second hand system which continued giving problems…. Scheduling Department don’t know what’s happening between the two and have now had the second system installed and only to find out that my car needs to be in sleep mode for the system to refrain from sending me Low Battery Signals at all hours of the night…. Some staff are very Professional however attention definitely needs to be paid to “Who” is responsible for what and the communication is none existent