Consistent incorrect accounts

Since being migrated from Nashua mobile to Vodacom I have had endless billing problems every month. This is ridiculous, I spent hours trying get issues corrected every month, this is pathetic service from Vodacom. This month I have to deal with a add on data bundle to one of my contracts which I have never had on this contract. I am getting fed up with Vodacom as a service provider. But if I dare not pay until the bill is corrected, I get cut off. Vodacom is just a big bad bully.