My disabled mother left with no security at night

We signed up with Dunmar , because you have a good reputation <br> from past experience and friends.<br> <br> My mother is disabled , and on the 24th March 2015 your technical <br> team came to adjust out alarm sensors as the \pet proof "<br> sensors still triggered. They adjusted it and left.<br> <br> During the night when my mother wanted to sleep and arm the alarm.<br> We could not do so because it system showed a \""parameter violation\""<br> <br> She phoned Dumar twice "