Have to agree with durian girl above but then Its Singapore . Maybe its different there. My cousin lived in one of those condos.. ( when she first moved there). fairly uppity neighbourhood. A teenager stalked her and one day actually held a knife ( steak knife) to her neck and wanted to kiss her. She screamed and ran back to her condo and called the cops. ( Like any normal person would do) The boy’s mother later came to threaten, then begged her to withdraw her complaint to the police. My son is very smart boy, he was just under pressure of his studies, he was just joking etc now you have ruined his future. She sat at my cousin’s gate everyday begging , threatening, wailing or over a month . Finaly My cousin had to move out on the quiet , had the movers go in and pack up and they sold the condo for a big loss. She had regrettted calling the cops since. As long as shes on Singapore soil she swore never to call the cops until she’s back on Canadian soil.
I hope I have not frightened you.

A classic case of people regretting what they did not do and not what they did.
You both did the right thing. I would definitely have called.
There are two possibilities. Either they stop fighting and you blush a little when the police come or you potentially saved somebody’s life.
Imagine if you didn’t call the police and find out the next day that someone was hurt/killed. That would be sad.