Vodacom the poorest signal in South Africa

I made several calls to vodacom customer care over the last 10 days to report that we in the Limpopo province at Bauba mine close to the Tsibeng area has none or very poor wifi signal and last night a lady said that she has reported the issue to their technical department and she would sms me a reference number which by the way were never send to me, Today when I called again to enquire the issue, I were informed by a recording that my number is blocked as I made several calls to them. We are a work force with more than 600 employees from this region and other areas that had to change from different providers to vodacom as its the only available signal in this area but for the last 10 days we cannot make proper calls or use our WiFi routers to lock onto the Internet ,yet they are not attending to our situation as they collect a large sum of money from us each month . What a poor provider and the saddest is that you have to pay a large penalty if you want to cancel your router contract