Very Very Disappointed

I only got my MB on Sunday switched my data On on Sunday for a couple of minutes and off and last night on for a couple of minutes then I get an sms saying I Do not have enough MB, im just tired of Vodacom robbing me as ive been using wifi from my work place to update all my apps and switched Google+ onto wifi im just thinking of closing my account because this cant keep going on every month. Im just sooo upset at Vodacom for not valuing us their customers I pay a fortune every month and this is how they thanking me sorry im porting to another network. Maybe CellC or MTN is better