What legal actions can I take against threats and harassment?

I was in a romantic relationship with Ms. (....) for 8 months, during which we shared personal time together. However, after the relationship ended, she began threatening to send our personal photographs to my family, friends, and colleagues without my consent. Additionally, she has threatened to file a false police complaint against me, alleging harassment and abuse. Ms. (....) has also contacted my friends and family, spreading malicious rumors to tarnish my reputation. Furthermore, she has been persistently harassing me by contacting me from different phone numbers, using abusive language, and making threats. She has even reached out to my acquaintances, inquiring about my whereabouts and activities.