Data has fallen!

<p>Today i bought airtime of R100 and then used R89 to buy 1G data like i always do. Within 3 hours of my purchase my data and the remaining aitime were depleted. I called the cuatomer "care" line for assistance and they told me that an app was running in the background thereby depleting my bundles. My problem is that i have been buying data in the same way for a long time and i have never came across such an issue, why today? I asked and I was told that they cannot help and they cannot reimburse me, the only thing i should so is change my settings. I feel ****** as there is no way that Facebook can consume a gig of data in 3 hours and i would like to be reimbursed in this regard.</p>