Real or just blackmailing?(SINGAPORE)

I’ll just cut to the main part and skip all the story telling

This person has a picture of my school Ezlink card which has my face on it.

They also have my phone number

they’re threatening me saying i have to pay them 1k SGD or they’ll send loan sharks to ‘deal with me’

Can they even find my address with my phone number , name and face?

I’ve made a police report already and 2 police officers have told me that it isn’t possible for them to find my address but i’m still so paranoid.

Anyone with any information or anything to say please say it i really need reassurance.