VODACOM - NO SERVICE

We contacted Vodacom regarding our deteriorating service on our cellphones. They came out and checked the signal at two of our houses. They have come back and said they have over extended their network and nothing can or will be done to improve the service. They said they would give a 20% discount if we contact them due to lack of service or we could go elsewhere but we would have the same problem as all the cell networks are over extended.