I live next to a school and heard a loud noise outside. A group of men have broken into thr playground and are making a lot of noise. I've called 101 but been on hold for 20 mins. I feel like it's not serious enough to call 999 as I don't know if a crime is being committed as it sounds like a group of lads just being silly. But they are still there and 101 aren't answering. Do I carry on holding or call 999?