Prepaid Balance $0 All of a Sudden
I have more than $20 in my prepaid balance and it has not expired, just as recently as 2 days ago. Today, I logged onto my Starhub app and discovered the balance was gone and there's $0 (zero) balance now. All along I've been using WIFI and there's no way that I could have incurred any other roaming charges, etc. Can someone please help?