Still being billed for a cancelled account

I have cancelled my account in November 2015 for Telkom Mobile LTE and found out today that \it is still being resolved\". This is three months of debit orders that is continuing to be deducted!<br> The call centre says that I will get a call to confirm my cancellation, still waiting!<br> Absolute putrid service, and the customer end up paying ****erally!)"