With very minimal usage 340 mb used in hours

hi guys, looks like vodacom started *****ing customers data, the first day of the month started this morning already 340 mb consumed from my data, which i hardly used whatsapp, facebook and gmail. how the hell 340mb can consume for those, i think i am strongly suspecting you guys *****ing data from my allocated. other wise how will be disappeared so quickly with out using, i havent updated any apps, at home i have wifi as well as work. so please go through and see, other wise i will have take up this one to legal.<br>