R5000 DATA OVERCHARGE

This is the second time in as many months that Vodacom has billed me with a R5000 data overcharge. This completely outrageous as I would never consciously download so much data via my cell phone. For this I have a computer. Despite my raising this compliant last month (FEB) I have had not feedback from the company who promised an investigation and report back. There should at least be a warning system in place to alert customers should they exceed their prescribed limits. It is completely ********* of Vodacom to just treat customers like idiots and then raid their bank accounts as they did mine for the second time. I have lost complete confidence Vodacom and their ability to act fairly. I would appreciate it if they would please keep their promises and investigate this matter. I have the right to know what is going on. This kind of practice needs to stop. Please keep to your promises.