What happened to my data????

Yesterday I loaded 1Gig of data then today I got notification that I'm left with 90MB, how is that possible, I called in to enquire about it and spoke to Sfiso who pretended not to head simply cause he didn't have the time to listen to me, funny enough when I was asking if he can hear me he would respond by saying "no". Telkom can you not test my patience and fix this problem ASAP because I need answers. I loaded a lot of air time and buy data almost every day which disappeares like a ****, then it's your lousy network. I need ANSWERS!!!!!!