data usage

<p>i moved from mtn to vodacom because i was tired of buying airtime that disappear. In the begining i was happy until i noticed that no matter what i do my data just gets finished in an unbelievable way . When i called for them to tell me why thay told me i have to restrict data so i did hoping my data will go in a normal way. Btu still it continued, i called again they told me to turn off automatic update so i did. I stoped using facebook and only used data for whats app and my emails. still taht didnt help. i would get a message that i have 4.84mb left then withen seconds another message will follow saying i dont have data. I vodacome sees my message please advise why is this happening because the people from the call center a re note helping or i would have to move again to another network until my data goes in a way that i understand.</p>