Avoid Vodacom, customer service does not exist

I am on a 10g per month contract, I pay R700 per month and every single month am I being cut off, when enquired to why, am I told that I have reached my call limit of R300? On a data deal of 10g? I don't even us that amount of data at work!!! Pathetic to say the least, when you call cancellations no one answers. And they want to charge me as part of the cancelleation a months fee that I already paid!!