Matt’s review published on Letterboxd:
Wow, now there's a horror film.
Amazing and highly disturbing story that as crazy and seemingly ridiculous as it gets you just know there are folk out there gullible enough to do the same. That's far more scary to me than any monster/ghost/axe murderer.
Only thing that bugged me was the lack of knowing motivation from the caller, maybe they could have made something up for the film.