Vodacom tricks clients into overspending on data

Vodacom data balance notifications have bugs and are inconsistent with *111# balances. I have 2 screenshots from this morning, sms states I have 4.7MB left and balance stating balance: 669MB. A call to 082111 (Celeste, reference ***) confirmed I have 669MB. So the notification encourages me to buy more data which would go unused because it expires after 30 days. In December I was billed around R3000 out of bundle data which i disputed (case S3-1YA2k/KCPOG) because I got no notification. Vodacom has told me I'll be getting most (not al) of it back (R2500) once off (!?!) as a courtesy (still waiting for the money). Yet it is their system that is buggy but find it acceptable to charge clients 10 times the price for out of bundle data yet not providing a service for us to manage this! And tricking people into buying more data unnecessarily. This should be *******!