Data is going missing

<p>Last month I started to notice, that me and my wifes data is running out very quickly.</p> <p> </p> <p>I bought an extra 1gb and Vodacom gave me and my wife an Extra 1GB for downloading the app apparently. My 2gb and my wifes 1gb was finished within 2 days and this while we are on wifi for most of the day. Ive got a data monitor app and the app said that Ive only used 300mb. How is this possible?</p> <p> </p> <p>So I thought I will leave it for the new month. My wife is suppose to get 2gb each month. Before 11 on 1 March she had already used 800mb acording to the vodacom app, once again while she was on wifi for the most of the day.</p> <p> </p> <p>Is vodacom just *****ing data? what is going on?</p>