Lost network all day

Vodacom network is the worst network now. I work in Durban central and Vodacom we miss calls all the time can't use data we have to get other sim cards with other networks just to function. Working for a government departments which have big state contracts with this Vodacom but the service is useless. In our office everyone has bought cell an mtn just in order to work as Vodacom let us down we have written to our big bosses to cancel the contract with Vodacom as it serves no purpose to have Vodacom as we can't receive call or use data, network is forever down and call centre says there is nothing they can do. I hope other network providers please bid for telecommunications contract Vodacom has lost it no service no real plan to fix network issues