Laguna 1.9dci alarm and starting trouble?

The renault fitted alarm (operatred via key card) on my pre-owned dci has the tendency to go off of its own accord- funnily, its always at night. Is there any way of disconnecting it under the bonnet as i dont think alarms do any good any way..when did you last run to the aid of a car in distress? Also, very occasionally it decides it wont start- just turns over and over but not firing, i usually find waiting a minute lets it sort itself out, is this just a continental style attitude to life or something more sinister? thanks
Answers:
A Renault dealer is the only reliable place to get this sorted.
Renault are just plain cr@p hun, get rid!
The starting problem sounds like the starter motor.With the alarm check your battery the charge might be getting weaker