Like others mentioned, Maria gives them hope but always has the upperhand. Like with the first one, the guy thought the code was the son's birthday, but it was actually his own birthday (for the sin of being born). She never actually gave him a chance, he was never making it out.
For this one, the girl has a chance to call 1 person in her contacts but she has to use her mouth/tongue to find the sim card. Even if she succeeds her mouth and tongue will be beyond fucked up from all the cuts that she won't be able to speak to the person she calls. After that, the rope will burn and she'll fall down the well, she'll be maimed from the fall, assaulted by bugs, and will bleed to death from her cuts, tied up and all alone in the dark. Again, she's never making it out just like the first one.