Disgusting service from VODACOM

Horrible service received from vodacom customer care. I have airtime missing i take my time to call and ask what happened. The lady I spoke to goes by the name Shamira she loses her temper with me. Breathes down my ear for my money. She told me she will speak to her supervisor and get back to me. I asked for a ref no she told me they dont have one. What is vodacom doing hiring people with no help to us. She only told me that call centre is based in cape town. And worst part of all she dropped the call in ear after that she sends a messages claiming the line has cut, how does the line cut and put into rating her service.