Vodacom is a ****!!!!! And ***********!!!!

A vodacom sales person came to my door saying that they are upgrading fiber lines, there would be no extra charges I would get a month to month contract for R100 less then I'm paying with better line speed. I agreed. For 2 months I got charged for 2 fiberline (the old and the new) despite 3 phone calls explaining that it was only 1 line, eventually they worked out that 1 house cant have 2 lines. Then the 3rd month I'm charged the old contract price. I phone again spend an hour on the phone. Month 4 still on the old contract price. I call to cancel but now I can only cancel in 6 months time or I must pay for the router. How is that month to month contract???