Vodacom refuses to assist with poor signal

After 3 years of complaining Vodacom has done nothing but apologize and make empty promises to fix the signal the vanishes. Multiple complaints were logged and they simply do nothing to fix the signal. Excuses like tbe tower is overloaded, loadshedding or there are no problems on their side are thrown around; but they do NOTHING to fix this. A new tower was promised to resolve this issue and 3 years later they still have not delivered. They expect payment monthly but cannot provide the most basic of signal. I sit with a cell-phone paperweight almost bi-weekly. The signal drops to the point where there is no internet; calls or messages; nothing can be done and Vodacom refuses to do anything to fix this. Overall EXTREMELY POOR SERVICE