Vodacom network issues

My wife has been with vodacom for years. No issues. From December last year she took out another 40gig data contract. For some reason after she took out the contract, vodacom started having issues with the network. We could not even use the data completely. In a month on days dat the network was ok, we would probably use about 3 to 5 gigs and da rest could not be used as we had no network coverage. She also started having problems with her cellphone, with no network for the entire day. Both devices will only come right after she phones customer services and they "refresh " the network. But this has become our daily routine now. We called vodacom numerous times, and eventually spoke to a superior who then directed the enquiry to the network technicians to check if the area needed a booster... but still, we have no joy. Right up until now, we still have no network and called again but this time apparently there is a national problem. We just want the contracts cancelled as we paying for services that we cannot use. Especially the data sim, there was no device issued to us so if vodacom cancels the contract we jst lose the data and they lose a customer only. No device will be at risk, but they dont even want to do that. We tried escalating it further but we jst got a call from someone stating they working with the problem and someone will get back to us. I'm writing this complaint as I have exhausted my options. Please assist. Anyone. Thank you