Vodacom... I have had it with you!

I have had it with Vodacom! We have been struggling for over two months with almost no call or data signal soon after I took out a new contract. Despite numerous calls to them over a three week period, sometimes three times a week and no action, I receive the following message today: "Dear Customer kindly be advised that the Network problem you reported to Vodacom has been resolved." At the moment we have no signal of any kind. I tried to call them and after 45 minutes of not being connected to a consultant, I had to hang up. And to top it all, Vodacom deducted more than double my subscription for December. Their explanation? A "system fault"! I want out of my contract as Vodacom cannot supply the services as stipulated in the contract.