Worst ISP I have had

I have been with Mweb for over a year now. The last 6 months at least my line speed quality has been under performing until I call them to reset on their side. I feel that it should not be necessary for a customer to waste hunderds of rands of airtime on this. Not only that but they base your usage on a continuous 30-day cycle, which means you never go back to zero. I feel cheated as they do not explain that to you when buying the product nor does the support staff freely explain it. They dance around the question: "When will my usage start over or reset?"