Hi @paulkong, if your concern is about TPG Singapore Mobile service, kindly send an email to Singapore Mobile Team at support@tpgmobile.sg or visit their Facebook Page to better assist with your concern.
Facebook Link : https://www.facebook.com/TPG-Singapore-785533401811953/
Though TPG AU & TPG SG are under the same umbrella, TPG AU is still operating independently as a separate entity and has a different data base from TPG SG.
