Vodacom worst billing system

Vodacom has over charged us with our cell phone accounts we have been using. We accept our part and have been controlling the use of the phone , yet the billing is coming up to an exuberant amount every month. Vodacom needs to work on their billing system as they are making it hard for us clients to work with them if they are not going to put in relevant measures on their side as well. Vodacom's service has really deteriorated over the past few years and I am extremely disappointed in their service to us clients. This is one network that only cares about making the most money and *****ing from their clients, that's for sure.