They've called because their pets are unwell, their DVD is broken, they've forgotten how to use their mobile phone, or maybe they are coming out of hospital and they want someone to be there.
Llaman porque sus mascotas están enfermas, su DVD se ha roto, porque olvidaron cómo usar su teléfono móvil, o tal vez porque salen del hospital y quieren que alguien esté ahí.