Late SMS for Data Billing

Good-Day<br> <br> I have a prepaid mobile, and quite happy with it. However, yesterday 19th April 2016, at 14:14, i had recieved 3 messages back to back stating<br> - You have 4.47 mb data remaining...<br> - Your data bundle has expired...<br> - You have been paying R2/1mb since 7am...<br> All 3 texts, back to back at 14:14?<br> <br> How can this be? This has never happened before. I generally get the first message and i have plenty of time to top up, but yesterday i was not given the oppertuinty to do so. Now i had no data, and had been charged R2/1mb for a full 8 hours.<br> This is unfair and wrong. Please confirm what is to be done here?<br> <br> Kind regards<br> Theo