UPDATE: Thanks for the info but im pretty sure we didnt receive any outstanding bill from the cancelled account at all. Plus, the bill shall linked to the principal line too, so if im paying monthly for the principal line, i shall notice it when i check my bill statement monthly. BTW, i lodge a report to MCMC (advice from someone) about this. And Maxis finally called to inform us that they have remove the outstanding thingy and when ask for reason etc, they say they just remove it and ask me not to worry about it anymore, thats all. I guess the fault is not on me??