no, they will engage a lawyer. and that lawyer will do the same
as what starhub did, ask you to pay. as long as you maintain your
stand and cont not to pay, they won't do anything further, unless
your bills add up to $100k or something lar.
but then, starhub will then blacklist you, informing both
singtel and M1 about what you did, so next time when you want a new
line, you're almost certain to be rejected.