***** on my mobile data bill

My data bundle as per my contract was used up during the course of last week, so as per usual I always buy the top up promotion data bundle for R39 for 500MB. As my data was finishing soon I purchased about 3 of these from last week & this week, I even received confirmation that these bundles were activated. On Tuesday morning I received an sms from Vodacom stating my data usage is unusual & extremely high and amounts to +-R3900 with contact details to call. I called about 30 min later & was transferred to the data team who I got through to the most unhelpful consultant ever & also very rude as she just dropped the call on me, she did however advise that my bill was now +-R4300 (so you tell me it can pick up by R400 in 30min?). She also confirmed that she only sees one promotion bundle purchased & that I was being charged R2.00 per MB (which still does not make sense as I do not download things, if you look at previous history on my account, my monthly bill is between R1200 - R1500, Vodacom is committing ***** my account or someone hacked into it. Also the consultant didn't know what she was doing as she cancelled my data on my phone & even suspended my contract (I cannot make cal