I've just received maxis bill statement today. The problem is I've ported out of maxis more than 5 years ago. Try calling them, gave up after 20mins put on hold, also left them a message on whatsapp still no reply. The current charge is zero though but the overdue amount less than rm10 but on bracket. Does that mean negative balance? Should I just ignore it?

Ok thanks for informing, just wanted to make sure I don't owe them. Its hard enough to contact them for information, I can't imagine how hard asking them for money back.