[necovek]

Assuming you tried going through whatsup first, report them to police or cell operator, let them deal with it: they might have access to which actual phones (IMEI) have been used for those numbers, and if those devices have also been used with non-burner numbers.

If they are indeed multiple burner phones (different IMEI numbers), then police it is: they can get IP and similar data from whatsup, etc.

Remember, you don't need to know who is harrasing her, just for them to stop!

[stdcall83]

Went to the police, twice. they did nothing. how do I go through whatsup ?

[hackermailman]

You're supposed to go through a lawyer when dealing with the police otherwise they just brush you off. Said lawyer will tell you not to escalate (like sending embedded payloads), and to document everything for the future. You went to the cops twice and gave up, imagine how many times this harasser has tried to screw you over, probably phoning in fake harassment claims to every police station they can dozens of times in hopes you get screwed over somehow by them. That's the petty game harassers do all the time. Should this person ever confront you in the physical world, and you do something violent to them, they will absolutely be lying to the police about it trying to put all the blame on you.