Vodacom Missing Data On New Month

I had a couple of gigs of data which is set to expire on December 12th, which I used sparingly just in case of emergency, since I'm mostly connected to WiFi when I'm home. This morning I woke up with no electricity and had to use data, but to my surprise, I had nothing left, conveniently on the first day of the month. The customer service representative that I spoke to blamed it on me and insisted that the system is infallible. I had received no SMSs prior to indicate that I was running out of data like I usually would if I'd be close to finishing my bundle, and I pointed that out.

The representative insisted that I'd been using my data the whole day even though I was connected to fibre for the entirety of last night and most of yesterday.

I'm taking my business to Telkom where I won't be spoken to like I'm an idiot that doesn't pay attention to their spending.