what are the statutory requirements for a harassment charge in your jurisdiction?
do the messages need to be threatening in order for a judge to issue a restraining order?
have you blocked her phone number, and she continues to contact via different phone numbers?
Have you asked her politely and possibly via certified mail, carbon copied to your attorney, to stop all communication and contact with you? and yet she has continued.
Has she ever touched or approached you physically in a way you did not feel comfortable with or feel threatened?