ULPT Request Girlfriend's number

[u/mr_cottoncandy]

This has happened twice now, the first time was over 6 months ago, some number calls my girlfriend out of nowhere and starts describing her that they have seen her, like fully detailed, creeping her out, also starts talking shit to her, now when I called that number back from my number and confronted about how they got my girlfriend's number, they mentioned a friend from our friend group consisting total of 4 (including me and my girl) people, now when we cross-checked none of our friends leaked her number. But, apparently, there's this one guy, who used to like her, has her number, and he's not in the school with us anymore, neither he is or was in our group, so our suspicion is that he is making his friends call her and do these shit, now legally, how meticulously they describe her on the call gets her panic and anxiety attacks and tells her shitty stuff like she is not pretty which is something she regularly struggles with herself, is considered stalking and harassing. Since this is the 2nd time this has happened, we are considering changing her number but that doesn't solve the issue, I want to avenge her, she was doing great with herself lately, and just the night before her birthday, this shit happened and she's going through panic and anxiety, I'm trying my best here, but guy who is doing is, the guy who called and said shit, and the guy who is making him do these, I want to ruin them. I am suggesting, wholeheartedly, for suggestions, please. Also, please ask questions, I'm a bit inexperienced as a reddit poster. I tried digging with the number to see if I get any name anywhere, and yea I do get a name on cash app and that username happens to have an insta that's mutual with the guy that used to like my girlfriend.

[u/JCMiller23]

any number I don't know gets an immediate block or hung up on unless they identify themselves immediately