Vodacom *********** clients

I recharged data bundles on Monday 27 April 2015 and by Wednesday 29 May 2015 I got an sms from Vodacom advising that my data bundles are depleted. I recharged reluctantly as 100MB normally lasts me at least a week and a half. 4 minutes after recharging another 100MB i got an sms advising that I have only 5MB left. I called the call centre was told that my query will be investigated and that a technician will call me between 1 and 48 hours. The next morning I got an sms saying my billing was correct as I had been on these sites Youtube, instagram, facebook, apple maps, itunes, soundclouds, etc. I don't know how I could have been on these sites in less than 4 minutes. The sms advised that I was given 250MB as a gesture of goodwill & I think they were brushing me off. I called the data centre and spoke to Potso and told her about my unhappiness as the data they recharged me with was now 218MB and I was asleep then and how could have the data bundles be use when I was not using my phone. She then blamed Apple saying they normally do updates without customers knowing. She also brushed me off & I asked to speak to a supervisor & she advised that her sup will call me, I'm stil waiting.