NO Service Delivery

We have been struggling with Vodacom to fix our problem with bad or NO reception for more than a month now! I've been e-mailing and complaining and phoning without any success! All they keep telling me is that the are escalating the problem to a higher authority and their Network Team but really nothing happens. We are a lot people in town who run our businesses from home. Without proper mobile reception we can't run our businesses efficiently and I loose income! This is real serious to me! I pay my Vodacom account promptly every end of the month and Vodacom never have problems getting my money. My Vodacom account consists of 3 separate number and totals to more than R 2000 each month. In return I get no service from Vodacom's side! Please help us!!!