Vodacom (lack of) customer service

My data has been disappearing for the past three days, called vodacom customer care centre and mandlama was so unhelpful and rude, even laughed on the phone. I hate how vodacom call centre agents can get me so upset at their lack of customer service. Its absolutely pathetic. Even though she was aware of disappearing data from previous data she pretended that mine was not a problem. If one wants to know how NOT to give good customer service, learn from vodacom. I wonder what they do with service query at the end of the call for years when nothing has improved.