Shocking cellular service from Vodacom

I live in Hillcrest, KZN, and there is only one tower on the south side of Botha's Hill covering the area. It is completely congested and regularly the service is unacceptable or not available. Their technical department told me a year ago that two new towers were being installed to relieve the congestion but this has not even begun to happen. They also have no fibre in our street so the net effect is a really bad service, and I run a business! Yet, they continue to charge me as though I'm receiving 100% service! What are you doing about it Vodacom???