Data Bundles worth R874 in less than 10 hours.

Very disappointed with Vodacom, I received a message this morning notifying me that my data with be depleted then I loaded 1G(R149) within 30 minutes my 1G was depleted called vodacom around 09:00 and Nomhle could not explain to me what happened instead she had to file an investigation then she will call after 2 hours, around 10am I loaded 250Mb in less than 3hrs dat was depleted then I spoke for an 40 minutes with Musa and still he could't give me answers to my question, I asked them what website was I on that can finish 1G in 20 munites and 250 in less thank 3hrs and how long was I on the site for and he couldn'tt explain instead he tried to make me look stupid like I don't know how my data usage. After speaking to Musa I loaded another 250 that just depleted in 10 munites then I loaded airtime worth R275 so I can buy data but still my data was just disappearing even when i was not using the phone and no one can explain to me the reason of disappearing data. Since this morning I have used R874.00 of airtime for data bundles. As Vodacom does that make sense to you, I normally buy data every 2 weeks this has never happened that i can use almost 4G of data in less than 12hrs.