This question probably won't be understood by most of you here, but I'll ask anyway for the sake of hit-or-miss.
I have recently got this phone call from this woman with a weird China accent (devoid in Singaporeans). I asked where did she get my number from, and she said that I "took a survey" and left my phone number there. From there she began asking a series of survey-like questions (which I all gave random answers and "IDK"s for....I love fooling around with phone surveyors) before asking for my identification number "for confirmation".
It seems like a bit of social engineering to me at that moment, so I simply went with a "Why do you need that?" and "I don't leave my IC no. on public surveys.". She bulled that she is just "a contractor" so I asked to "speak to her boss", from there when she cut the phone line.
The phone number is with-held. Is there a way to get a with-held number, or get the phone company to reveal it without going through a lawsuit? I know phone companies are not allowed to reveal with-held numbers, only to the person who owns the line.
P.S I know a few tricks to defeat social engineering, but I am incapable of pulling such heists off myself. So putting up tips on how to call and which information to seize is pretty useless for me.