My Sisters Are Being Sexually Harassed In Public

السلام عليكم ورحمة الله وبركاته

My sisters and their friends are being sexually harassed by men at a park they go to.

I 20M, confronted them about the matter, but they seemed to not care about what I said. I gave them a warning and told them if I see this behavior repeated I'm going to call the police.

The probelm is I don't speak Arabic, so if I called the police I won't know how to tell them about the whole situation.

What do I do? And as a side note do anyone here know any policemen that speak English that i can talk with? Or someone I can file a complaint to so they can take swift action?

FYI: We reside in Jeddah. Alhumdulillah my sisters and their friends are practicing Muslims and they cover themselves properly. I talked to a few people around me but all they tell me is to switch parks. Even if we switch parks, I'm afraid these "men" will keep sexually harassing women until they taught a lesson. My sisters been going to the same park for about 2 to 3 months now. My sisters didn't tell me about the matter because they were afraid that our parents won't let them go the park. Now it has gotten to such an extent they couldn't bare it and finally told me to do something about it. .

Ps: forgot to mention a key point..... our iqama is expired so I'm kinda afraid of the cops.