Why has your police department said they don't want to deal with it? Have you shown them the e-mails, do they know she vandalized your place? Did you call them when she did this?
The highway patrol who is a neighbor -- even though he personally intervened and stopped her from vandalizing your place further, can not legally assist you in this matter and will probably stay far away from it (other than to tell you to call the police). At this point -- considering you've not attempted to get a restraininig order yet (and since a restraining order has therefore not been violated yet), there is no need to change your phone number. Many many people think this is a good solution (changing your phone number and e-mail before doing anything else), but actuality it's not the best thing to do nor is it suggested as the first line of defense by law enforcement. Changing a phone number sometimes "provokes" a would-be stalker (makes their behavior worse). Victims of harassment and stalkers should deal with the harasser / stalker heads up and by the book. It sounds like you have tried to get something done by the police, but you should keep trying. Print the e-mails and go to the police and say "we want something done, and we want it done now, and we are not going to take no for an answer". If they refuse to assist you, you tell them again you feel your life is in danger and that if they refuse to assist you, you will file a complaint. It should not take these extremes to get instructions from them on how to get a restraining order. Also, if you feel safe in doing so, you need to advise this "stalker" specifically "Leave me alone, or I will call the police and get a restraining order". A history of these words having been spoken by you to this person needs to be a matter of record. All you have to do -- after these words have been spoken and this person bugs you one more time -- is go to police and tell them. The police, upon their knowledge that you have advised this person to leave you alone and the person has violated your wishes, should advise you to go to the magistrate's office to get the restraining order. If it's an emergency, the police can call the magistrate themselves and get an emergency TRO (temporary restraining order). If this person still stalks you after a restraining order has been issued, then it might be time to change your phone number, but if the person knows where you live -- watch out in doing so. It sometimes will provoke them to show up on your property.
Good luck.
hmmbrdzz
