Incompetence and Breach of Contract

I upgraded my contract online two months ago and was billed incorrectly last month and not given the full benefits of my contract.I received R15 less airtime than i was supposed to and did not receive the 1 gig of data that comes with my contract.I had to wait an entire week before i got my data after logging a call with them.I was promised that someone will call me back from vodacom but i ended up having to follow up.I then eventually got the data and the additional airtime due to me and was told that there wont be a problem this month.Once again i did not receive my data or the full airtime value due to me on the 1st of July.When you call Vodacom you get sent from pillar to post because its always another departments problem.You get no feedback except for a reference number which clearly doesn't mean anything to vodacom because they don't sort out the problems related to that query.They are clearly in breach of the new contract and I am well in my right to cancel this contract since they have not delivered on what was promised online as well as telephonically.<br> <br> The reference number quoted to me last month was S3-88M2V-VFWCI - which clearly serves no purpose at all.