Extreamly poor data as well ass customer service

I have been experiencing issues with my data throughout 2017. My data utilization is set up in a way which forces me to purchase new data. I receive a 2 month view of my data and my future months data is used before my current months, by the time I get to my future month my current months data (which has not been used) expires, and my future months data is used, so I need to purchase data bundles in order to have data. This is firstly a poor customer experience and secondly ********** in that I am being ****** of my data. I have contacted Vodacom customer care, and made several enquiries only to be pushed from pillow to post with no resolution. I also find the customer care staff to be *********** in handling my query and some even display bad attitudes when I disagree with their feedback that the system is designed to work in this way and there is nothing they can do. I have been a Vodacom customer for many years, however its time to move on...