Alarm trouble....

Can anyone help with alarm trouble?!!

My cab is de-locked and only openable by the alarm fob. Took it to garage before and paid ?100 to stop the alarm siren from going off randomly in the early hours
but 3 months on its started again and now drivers door wont let  me in!
Most annoying as neighbours complaining and im sleep deprived..!!!!

battery in fob for a start.
then more info needed im afraid.

lesson learned.
don't delock your car :roll: (sorry uncalled for i know)

mmm i know-bought it like that tho!! Changed batteries already.
Bugger it-am gonna pay out for new alarm system and get some decent sleep!! :wink: