
Years ago, somebody was leaving long messages in my mobile daily...
Talking as long as the answerphone recorded saying things they would like to do to me(sexual kind), when should they come and visit, saying they know I'm home alone etc...
I even talked to them as I picked up the phone but I still had no idea who this person was.
The messages got worse and worse and after about a week I went to the police, their response: Change your phone number!
I had to speak to them via a phone in the reception and describe what was said in the messages... Nobody was even bothered to come down, take proper notes and listen to the messages themselves!
Needless to say I think very highly of the police here...
Do not let them just ignore you and your fears!