My ex-girlfriend often harassed my family and went to the place where my parents worked to disturb others. Harassment

First of all, you can't be polite to shameless people. If you are polite, she thinks you are a soft persimmon. Tell her sternly that you are responsible for your actions and show your manly majesty. You can't let her push her luck. Everyone bullies the weak and fears the hard. If you are timid and afraid of her, she will bully you. But it's not good to pay attention to the scale so as not to stimulate her too much.

In addition, tell the parents about this matter lightly, don't let them worry too much, let them have a psychological preparation, so that when she goes to make trouble, her parents will be caught off guard.

You can sue her if you want, but not without evidence. Evidence is needed in court. It's not that the result is bad, and the court doesn't want to take care of these things. It's best not to go this way. This is the second best strategy.