Immediate response for an unknown phone help, within my city.

Good evening, I received a call from a number with the area code of my city. I am from 9 de Julio, Buenos Aires province. When I tried to answer because I don't know that number from my city, the call immediately ended. I called back, and it said the person was on another call. I kept trying and sent a direct message asking: Who are you??? No response. I kept insisting and made a video call, but they didn't answer or join. I called again, and it went to voicemail. I called once more, and it said they were on another call. Can you identify this number for me? It doesn't even have a profile picture. Otherwise, I would already be calling the police or emergency services to track this number and stop the harassment. I'm not afraid; I don't know if it's a man or woman, but I must be cautious so they don't bother me anymore. This is the first time this has happened, and I want to unmask whoever it is for disturbing me at certain hours of the night, causing fear, suspicion, fraud, scams, or knowing where I live. It worries me a lot that they bother me at certain early morning hours. If you don't provide me with immediate information, I will call the police or emergency services to track them and feel protected. The cell phone number that called me and now does not respond to calls, messages, or video calls, always saying they are on "another call," is: [PHONE]. Can you identify it as soon as possible so I can know if I know or don't know this annoying person? I await a prompt response and want to know how you will contact me because I used to distrust numbers from Buenos Aires, which I block all of them, especially a call with the area code of 9 de Julio, Buenos Aires province. Thank you very much, and I look forward to your prompt response. PS: I am not searching or tracking this number through this app because this is the first time I have to install it, and I don't know how to use it properly. Thanks again! Regards, Marcela Novas, 9 de Julio, Buenos Aires province. My cell phone: [PHONE]. Please give me news as soon as possible; it makes me desperate and curious who is calling from here and yet does not identify themselves???