Group FaceTime Pranks Resolution or class action

I have been prank called through FaceTime by a group of ~30 teenagers. This has been going on for over a year, and they will call at all times of the day, late at night, and early morning. I continue to have to scroll through every number to block them 1 by 1, but they continue to call from new numbers.

Please advise how I can permanently remove my number from this group, permanently block group calls that contain even a single one of these 30 numbers, or what legal action can be taken either against the callers, my service provider or other group OR if there is any type of class action suit being formed to address these situations.

Surely Apple has a solution that can be offered to this situation. Thank you for your prompt response.