That's just freaking bizarre. You need to be writing all of this down (so you have a record of times, dates, etc) and also if you have any evidence of the texts etc that she sent, try to make some backup copies of their content, when they were sent and the phone number they came from (photos of your phone if nothing else). I would also be requesting copies of the any of the police documents (if any) relating to the complaint that was made, to ensure that the officer's conclusions have been documented.