Vodacom non existing customer service

I own a very busy lodge. I reported to Vodacom that we have no signal at the lodge, although the properties 100 meters away have signal. Two years later, after phoning on a weekly basis, I am told that the "case is closed". According to Vodacom a technician was at the property and resolved the issue. Really? No one even returned my calls, never mind doing an actual site inspection. In the interim none of my guests can use their phones or access their data. MTN customers have full signal. Why Vodacom? Why do you not care at all?