Vumatel is useless

For the second time over this past two weeks, my internet connectivity suddenly stopped. I called the call centre today and logged a problem. The call centre agent, Porchia, checked and acknowledged that there was a problem with Vumatel. Why does this keep happening... I still without internet. what does it take to get this resolved? I mailed the CEO Dietlof Mare, but no response either. my reference is 143102.