Dissapearing AirTime

I put in 50MB of data twice on my phone once @ around 5AM and again @ 7: 30am. I understand this is not a huge amount in terms of data, but looking at my trends its concerning that 50MB disappear in less than 10 minutes. This is without receiving any huge mails, or even going on social media, not even You Tube. I noticed this consumption was not as per normal usage, and clearly was a case of disappearing data. I also saw this reported on My Broadband previously. In fact I did not even go on website, when my last 50MB disappeared. normally this amount of data last atleast five hours, with normal usage, obviously excluding videos or streaming. My updates are set to go of wifi as normal, also when I load 1GB it last the entire month, as I do my major data use over WIFI. If 50MB gets used in ten minutes I should use 6GB a day/180GB, with no streaming. What added insult to injury was the consultants attitude, who insisted the problem was my updates, which was set to update over WIFI only. I have always had this setting, I was quite frustrated at the call. I was asked to terminate call, and did not want to. I was advised that the agent could not terminate the call, somehow the call did end, the agent did not try and SMS or even call back. Two issues disappearing air time and service. What needs to disappear is the mentality from Vodacom if we ignore a problem it will vanish.