Psychological thriller movie about woman being chased by strange murder but anyone wont help and just filming with their phone instead

i remember they have some episodes so its not a movie. its about someone who is punished for some crime, but the punishment is more like a psychological one. so this woman doesnt remember anything, she just woke up from her bed to a simple room and 30 days calender that has been marked for couple of days. she proceeded to go outside and found that she’s being chase by weird murderer but nobody is helping her, they’re just filming with their phone. at the end of the movie, she turns out guilty and being punished to phsycological treatment and being watch by so many people everyday.

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Sounds like Black Mirror: