How to stop gangsters from raping or hurting me?

Im scared of these group of gangsters(20 or 19 years old) that hang around my neighborhood,and the reason why is because every time they see me they do that whistle sound and they tell me stuff like"ill bang you hoe" or "sexy mami". Im scared and they have threatened to do stuff to me. They carry around guns and im thinking about calling the cops but i dont want them to kill me!! Help Me