My girlfriend hit the data cap last month and get charged twice for $10/GB each.
She couldn't find a way to cancel the auto top-ups in the website, and even called the customer support but the staff simply said there's no way she can do it.
While I'm with Jeenee (Optus network), I can simple do this with a click in its website.
That's ridiculous that they can totally do it technically, but they just said they can't and force you pay.
Although they sent the data alert but still not very convenient to track and stop using the data just before hitting the data cap. Most of the time you get charged already while you receiving the 100% data usage notice.
Do you think I can report this to ACCC for this matter?
If she is on a plan she should consider increasing her data allowance.