fake fraud

A person named Dev was my friend. After asking thousands of times, he did not tell me about his actual occupation, so I stopped keeping him in my contacts. After several months, this person created a Facebook ID named Alex and approached me to be friends. I made a mistake and agreed. He never shared his photo or any details even once and is constantly harassing me online and also harassing my other friends and contacts. What he does is hack me through my Facebook, Gmail, and also through my Telegram, which is a crime. I don't put anything suspicious on my phone, but this person is trying to create fear in my mind. I am already a person suffering from mental illnesses; I have schizophrenia and bipolar disorder. Also, this person knows this. Imagine what kind of upbringing he had that he still harasses me so much. I can't tolerate it anymore; he is harassing me nonstop. A few days ago, he approached me by making another fake account and put my old Facebook acquaintance's photo as the display picture and started casually interacting (he obviously knows my mood and timing because he hacked my phone). Somehow, he started lashing out at me even when he saw my condition was stable. This person wears a fake military uniform and I have his real ID on Snapchat: armyboyarmyli26, and his name is Dev. His profession is to bother common people by pretending to be a fake soldier. He never stops harassing on Telegram. He has a name there for girls: lovesone007. I will definitely get my phone rebooted, and I will definitely greet his mother, but he was so furious during the conversation that he even said his parents are dead, he lives with his grandmother in Kolkata, he doesn't get food to eat, and he was saying very dirty and vulgar things about girls and Kolkata people. He said that's why he is looking for a woman like me. I will request the police to catch this fake soldier as soon as possible, seize his phone, beat him 7-8 times, and put him in jail. Please keep an eye on him.