Data Usage

My data contract got soft locked with a Huge bill of R700. This is where things get interesting.<br> This has happened to me before and I have learnt from my mistakes.<br> I've taken the necessary steps to prevent this.<br> I have created SMS alerts when my data is depleted and this it has worked in the past.<br> I've lower my out of bundle limit to R51 as this is the lowest I can set it too.<br> I always disconnect my sessions after every use as excessive sessions the data will be calculated after the session.<br> I've never received any call limit SMS's nor did my bill stop R51 after I reach my limit.<br> I want someone to investigate into this matter as your system is at fault.