What do you do when your girlfriend doesnt have the respect for you to not come when she say shes going to be?

my girlfriend went to a movie with a friend sent me a text saying that it was over and that she was going to go hang out a little and shed be home in a "lil" later saying "by midnight" is when she was coming home. i stayed up to 1:30 trying to get a hold of her just to find out where she is with no luck. i wake up and shes in bed having no idea what time she came she says 2:00am but i got a text at 4:00am telling me that she is sorry and is on her way.