DATA ISSUE

So again Vodacom Locks my account for purchasing data. My statement says my payment is due by month end which payment i made yeterday and I get told I have to send proof before they can unlook it. How the hell do I send proof when I have run out of data. Should I incur costs when a bunch of imcompetent people can't do their jobs properly. A sismi**** situation happened last month. Why is my account in a locked status when I pay on time. I am fed up and seriously considering changing networks. This cannot keep happening. I have no data so what am i supposed to do?