VODACOM DATA LOSS

I have been having endless problems with data and Vodacom. I have 4 contracts with Vodacom and I am extremely unhappy with the service. Firstly for the last three months the data on one of the contracts just get finished in an hour even if it is just left on and no one uses it. I called Vodacom on the 15 January 2019 to check and query on the data loss. To date no one has called me back regarding this. I had to call back today the 25th January only to be told someone else is using the data. No one bothers to call back and tell you the progress on the query and when you do call they go in circles instead of giving us a solution. I am tired of hearing that someone else using the data. All I want is Vodacom to re-imburse me for my three months loss data and then I will cancel this contract as it is due for upgrade. I am tired of hearing excuses from Vodacom. I do not think I will be upgrading any more contracts in the near future,.