The characters ask dumb questions or say things that wouldn't matter in such a situation. When asked for a description of the boy Krissy was talking to online, her friend only said "dark hair and 17." Uh, usually the first identifier is race, something that narrows down the possibilities right away.
The kidnapping came too soon. Viewers need time to get to know the character before we care about what happens to them.
And I agree with another poster. If the movie is filmed in the UK and all the actors are British...why not just set it in the UK? Crazy.
Last but not least, why is no care given to black actress's hair? There are plenty of black stylists who are available to work on movies. And what's more, most black stylists can do all kinds of hair because black people HAVE all types of hair from straight to kinky. Most non-black stylists don't know how to do any type of hair but their own.